Information about COVID-19 vaccines is changing rapidly. Please check back often for updates and additional information. We will continue to make updates as more information is available.

As a hospital system that advocates for vaccinations and for the health and safety of our staff, Denver Health stands behind the safety and efficacy of the COVID-19 vaccines as highlighted in the emergency use authorizations by the FDA. Please review the following FAQs with information provided by Denver Health leadership and physicians/providers, the Centers for Disease Control and Prevention, the FDA and the Colorado Department of Public Health and Environment.

This FAQ is divided into two parts:
1. The Denver Health Employee Vaccine Distribution and Phasing/Timeline FAQ
2. The COVID-19 Vaccine Safety and Efficacy FAQ


Q: I’ve heard a lot about different COVID vaccines. Which one(s) is Denver Health getting?

Denver Health has received the Pfizer, Moderna, and Johnson & Johnson vaccines. We are vaccinating employees and patients with these vaccines. The Pfizer vaccine requires a two-dose administration, roughly 3 weeks apart. If you get the first dose, you will get the second dose. The Moderna vaccine also requires a two-dose administration, roughly 4 weeks apart. Please note that you should receive the same brand vaccine for both doses. The Johnson & Johnson vaccine is a single dose.

Q: Am I required to take the vaccine as a physician, nurse or other frontline staff?

No. Denver Health is not requiring any employees to take the vaccine at this time. We encourage our employees to receive the vaccination to protect our families, fellow staff, and patients and to increase the likelihood that we stay healthy to care for our patients. Staff should not feel pressure to take the vaccine nor should managers in any way pressure their teams to take the vaccine.

Q: Who is getting the vaccine first and why?

During the first several months of 2021, the amount of vaccine available won’t be enough to give to everyone right away. Denver Health is following guidance from the Colorado Department of Health and Environment (CDPHE), and the Centers for Disease Control and Prevention (CDC) on how to get the vaccine to people who are most at-risk of getting COVID-19 and having severe disease if they do. Current guidance is frequently being updated as we have more doses of vaccine and more information about groups at risk. The current vaccine distribution guidelines can be found on the CDPHE website.

Q: What is the registration and notification process?

  • All remaining staff members can now schedule their vaccinations.
  • Filling out the vaccine pre-registration form is no longer a required step in the process.

Employees who had not yet scheduled a vaccination appointment-
You should have received an invitation code from MyChart on Jan. 20.

If you need to create a MyChart Account:

  1. To create a MyChart account, go to or download the MyChart app on your cell phone.
  2. For help setting up your MyChart account or logging in
    Call MyChart Support
    Monday thru Friday 8 a.m.-10 p.m.
    Please note: The Help Desk cannot assist with this request.

Once you have a MyChart Account or if you already have a MyChart account:

  1. Log in to MyChart and click on "Schedule an Appointment."
  2. Click on "COVID-19 Vaccine."
  3. Enter the personal code that was sent via email on Jan. 20.
  4. Schedule Your Vaccine: Please schedule your appointment right before you are scheduled to be off for a day or two in case you have mild post-vaccine symptoms. If that is not possible, schedule the next best option and notify your manager so they may work with you to facilitate your coverage while you leave the unit to get vaccinated or if you feel ill after receiving it.
  5. Get Your First Dose; Schedule Your Second: After you have completed your vaccine appointment you will be asked to wait for 15 minutes to be monitored for a reaction. During that time, you will receive an invite through MyChart to schedule your 2nd vaccination.

Q: Do you need people to help with our vaccine clinics?

We do need Denver Health staff members to help staff the vaccine clinics and there are a number of positions we need to fill. Talk to your supervisor before you sign up. Your supervisor’s approval is needed if you are staffing in a vaccine clinic as part of your regular shift. Fill out this Staff Interest Form and let us know which positions you are qualified to do in the vaccine clinics. You’ll get an email with next steps to register in Sling. Some overtime shifts may be approved on a limited basis for hourly employees. Salaried /exempt roles will not receive additional compensated for shifts worked.

Additionally, we are accepting applications for external clinical volunteers. If you know of individuals with a clinical background that can perform in needed roles, please direct them to the Denver Health volunteer website to fill out an application. We are not able to provide EPIC access to external clinical volunteers so positions are limited to reconstitution of medication and administering vaccinations. Please reiterate to your contacts that we are operationalizing multiple vaccine sites. It will take time for our team to reach out for scheduling depending on our internal timeline for opening more vaccination sites.

If you have any questions, please feel free to reach out to the Incident Command Center email:

Q: Are Denver Health patients getting the vaccine in this first phase?

Denver Health believes strongly in protecting both its staff and its patients, and we are following State and Federal guidelines to vaccinate all eligible individuals under the State’s guidance. For more information on who is currently eligible for vaccines, please visit,

Q: When was the first vaccine given?
The first vaccines were given on December 17, 2020 in Pavilion C of the main hospital (Osler Room).

Q: If I decline the vaccine initially, but want it later can I change my registration?

All Denver Health staff now have an invitation for the vaccine regardless of your initial answer to the survey. See details on creating MyChart account and scheduling above.

Q: Will family members of staff be eligible for the vaccine?

Family is not considered as part of the health care workers vaccination priority, thus family members will have to wait till the priority group they fit into is eligible for vaccine according to State and CDC guidance. Family members are welcome to register with Denver Health for vaccination through our community portal. Registration will place them “in line” for vaccination once their designated priority group is eligible.

Q: I don’t have a MyChart account yet, and I did not receive an activation email.

All Denver Health staff have been invited to get vaccinated. If you have not received and email, it is likely the email address we have listed as your primary in Epic is not one you regularly check (or even have access to anymore). Please call the MyChart Help Line at 303-602-4380 to update your primary email address in Epic and have a new activation email generated. You may also directly log in to MyChart to see if you have a vaccine invitation and are able to schedule vaccination.

Q: I got an activation email, but I can’t get beyond the challenge questions to create my account.

It is likely the zip code on file in Epic is out of date. Please call the MyChart Help Line at 303-602-4380 to update your demographics and get signed in.

Q: How do I reschedule my appointment?

To reschedule your appointment, you must first cancel your existing appointment. The “Reschedule Appointment” does not work for ticket scheduling. If you need additional help, please contact the appointment center at 303-436-4949 or 303-436-7000.

Q: Why am I not able to schedule beyond a certain date?
More scheduling slots will be added as we get additional doses of vaccine.

Q: Can I just call the appointment center to schedule my appointment?

We need to reserve Appointment Center resources to help patients. If you or your staff are legitimately unable to utilize MyChart (due to lack of internet, lack of access to a computer/mobile device, etc), that is the only time we would recommend seeking help from the Appointment Center for staff vaccine scheduling. If you need help working with MyChart, please contact the MyChart Help Line at 303-602-4380.

Q: If a heath care worker has had COVID-19 and recovered, should they still get vaccinated?

The vaccination may provide stronger or longer lasting protection than natural infection. For that reason, employees who have had COVID-19 will still be offered the vaccine. However, anyone currently infected with COVID-19 should wait to get vaccinated until after their illness has resolved and they have met return to work criteria set forth by COSH.

Q: Is PPE still required after receiving a COVID-19 vaccine?

Yes. While we learn more about the protection that COVID-19 vaccines provide under real-life conditions, it will be necessary for everyone to continue using PPE according to institutional guidelines to help stop this pandemic.

Q: Are there plans to provide proof of vaccination for those who get it? I can envision this becoming something that airlines will request or foreign governments may ask for in order to permit entry once travel resumes.

Yes, we are going to be handing out vaccine cards to everyone at the time of vaccination, which you should keep as proof that you received the vaccine and which one you received. There will be a place on the card for the second dose of the Pfizer and Moderna vaccines so you should bring the card to your second dose if you are receiving these as well. If the card is lost, information about the vaccine you received will also be saved in your medical record.

Q: If staff choose to receive the vaccine, will we have to accommodate them getting this on the clock or is it ok for them to do this on their own time?

We encourage all employees to work with their managers on an appropriate time to receive the vaccine. We do approve of employees receiving it on the clock, as we do with flu vaccine.

Q: What is our plan to communicate with the communities we serve? This will be very important to ensure our communities have accurate information to make decisions about vaccination.

We want to encourage everyone to get the vaccine. We’ll be reaching out to all of our patients on MyChart. We are being mindful of the diversity within our community and we need to be culturally sensitive in our outreach and communication when informing community members about the vaccine and its safety. Denver Public Health and CDPHE are also doing extensive outreach to engage with communities that are typically more hesitant to be vaccinated or have less access to health care.

Q: Will I have to pay for the vaccine?
No, at this time all of the doses are being purchased by the U.S. government. Your insurance carrier may be billed for an administrative or physician fee.

To ask questions not found on the FAQ, please email


Q: Are the vaccines safe?
The three current vaccines were administered to well over 100,000 people in large studies who have been closely monitored over several months for any adverse events. All three vaccines have been very carefully evaluated by the FDA prior to authorizing their use and they all appear to be very safe. Additionally, safety of these vaccines will be evaluated on an ongoing basis among people in the clinical trials as well as in the general public.

Q: How effective are these vaccines?
Initial results of studies of the Pfizer and Moderna vaccines show that the vaccine decreased the risk of getting sick with COVID-19 by about 95%. In addition, for people who received the vaccine but did get COVID-19, the infections tended to be less severe. The reduction in cases in the J&J trial was lower than the 95% which has caused some confusion, but the most important finding from the J&J trial was that it appeared to be 100% effective at preventing hospitalization and death, and that trial was conducted in several countries where newer variants were circulating compared to the Pfizer and Moderna trials which were largely conducted in the US.

Detailed information about each vaccine can be found on the CDC’s COVID-19 vaccine website.

Q. What is the efficacy of the J&J vaccine?
The J&J vaccine was assessed as a single-dose in the recently completed ENSEMBLE 3 trial, which was conducted in multiple sites around the globe including the US, South Africa, and several countries in Latin America (it is important to remember that the ENSEMBLE 3 trial was conducted in multiple countries, including those in which coronavirus variants are more common, compared to the mRNA vaccines when comparing efficacy results). The trial enrolled nearly 45,000 subjects (data from ~40,000 are presented in the FDA document), and the company committed to enrolling subjects from communities of color who have been disproportionately impacted by the COVID-19 pandemic.

The FDA document released 2/24 stated a 66% efficacy at preventing moderate and severe COVID-19 at 28 days after vaccination; in the US efficacy was 72%. In South Africa, where perhaps the most concerning coronavirus variant was circulating during the trial the efficacy was 64% (7 points higher than reported in preliminary press-release) and 61% in Latin America. Moderate COVID-19 included manifestations such as pneumonia, DVT, difficulty breathing, or two or more symptoms of COVID-10 such as cough, sore throat, fever or chills. Severe COVID-19 indicated systemic illness, respiratory failure organ dysfunction, ICU admission, or death. Because the primary outcome included both moderate and severe outcomes, the lower efficacy numbers may be misconstrued as indicating that many cases of severe illness still occurred in the vaccinated group. However, analysis of the secondary outcome of severe/critical illness demonstrated 77% effectiveness at 14 days and 85% at 28 days; there were no hospitalizations and no deaths in the vaccinated group (compared to 5 deaths in the placebo group). Among persons <60 years, protection against severe outcomes was 90% at 28 days.

Q: What are the side effects of these vaccines?
It is important to recognize that part of why these vaccines work so well is that they provoke a strong immune response, which can cause people to feel unwell for a day or so after the vaccine. For some, this is described as feeling like they have a hangover, and it is more common after the second dose of vaccine. In the Pfizer and Moderna studies, the most common side effects include soreness, redness, or swelling around the injection site, fatigue, body aches, or headache. These reactions can be treated with ibuprofen (Motrin, Advil) or acetaminophen (Tylenol) if needed.

Q. Is the J&J vaccine safe? How do the side effects compare to the Pfizer and Moderna vaccines? Overall, the J&J vaccine appears to be safe, and the side effect profile is similar, but potentially slightly more favorable, compared to the mRNA vaccines. The most common side effect was soreness at the injection site, but the vast majority of these were minor: less than 1% of recipients had local soreness that required a pain reliever or had limitation in normal activity. Similarly, systemic side effects occurred frequently, including headache (39%), fatigue (38%) myalgias (33%), nausea (14%), and fever (9%). Higher grades of side effects were more rare, occurring in 1-2% of recipients. High grade fever >39 degrees occurred in 0.2% of recipients. As with the mRNA vaccines side effects were more common among younger recipients (<60 years).

Q. If the J&J vaccine has lower efficacy, why should I get this one vs waiting for doses of Pfizer or Moderna?
All available vaccines are safe and extremely effective against severe illness, hospitalization and death from COVID-19. Because there are more people who need the vaccine than available vaccines, the best vaccine is the one that is available to you at the time you are eligible.

1. Though the primary endpoint in the J&J study was the occurrence of moderate to severe disease, the end point that we really care about is the very severe disease that leads to hospitalization and death, because these are the events that overwhelm the health-care system and represent tragic events. Though the numbers of subjects with this endpoint are small, the J&J vaccine was highly effective (100%) against these outcomes.

2. The J&J vaccine was tested in settings that were more challenging to achieve high efficacy, particularly in South Africa where the B.1.351 variant was circulating. As such, this is the only trial with evidence of vaccine protection against such a variant, which we expect to circulate more and more widely.

3. The J&J vaccine is the first vaccine available in the US that comes with data on the impact of transmission from a large prospective clinical trial, which suggests that there may be a 74% reduction in the risk of transmission. This can be described as a major benefit—it will allow recipients to know that they are protecting family members who are not vaccinated, and will be particularly useful in congregate settings such as jails where transmission has been so devastating.

4. The fact that J&J vaccine is only a single dose means that people can get protection without having to do any more work to schedule and attend the second dose—one and done!

5. Because supply issues exist, the choice is between the immediately available vaccine and no vaccine, rather than a choice between the three manufacturers. Please take the soonest available vaccine appointment when you are eligible.

Q: The side effects of the vaccine are the same as signs of COVID. Will we have numerous staff out because they are waiting for a response from the Employee Symptom Survey? How are we planning on handling an increase in employee testing? Or will COSH not recommend testing for those that have just received the vaccine?

Common side effects of the COVID-19 vaccine include fever, chills, headaches, pain at the injection site and fatigue. After receiving the COVID-19 vaccine, you may consider taking acetaminophen or NSAIDs to try and minimize the potential side effects.

If you develop these side effects, you may still come to work wearing appropriate PPE. The screening questions you are required to answer prior to coming to work will be modified to include language specific to having received the COVID-19 vaccine. However, because these symptoms can also be consistent with COVID-19 infection, if the symptoms last longer than 48 hours after vaccination or if you develop any new respiratory symptoms (rhinorrhea, cough, shortness of breath) or other COVID-19 symptoms (sore throat, nausea, vomiting, diarrhea or new loss of taste or smell) after vaccination, you will need to either leave work or stay home from work and complete the Employee Survey to determine if COVID-19 testing is needed.

Q: How long does the protection of the vaccine last?

We don’t know at this time. The studies have followed people who received the vaccine for almost 6 months now without any evidence that the protection is wearing off. The hope is that the protection will be long-lasting, but it is possible that we will need booster shots in the future. We will have more information about this in the coming months.

Q: Why are there 2 doses for the Pfizer and Moderna vaccines?

Many vaccines require multiple doses, such as those for pneumonia, Hepatitis B and measles/mumps/rubella (MMR)--all require multiple doses to ensure full immunity. The first shot shows the immune system a piece of the virus which stimulates an initial immune response. The second shot is the booster, allowing the immune system to fully develop responses that are both effective and long-lasting. The J&J vaccine was able to produce high levels of antibody after only one dose which is why for now a second shot is not needed. There is an ongoing study to see if a second dose of the J&J vaccine gives additional benefit, and there are also studies to see if only one dose of the Pfizer or Moderna vaccine will be enough.

Q: Do I really need the second dose of the Pfizer and Moderna COVID-19 vaccines?

Both the Pfizer and the Moderna vaccines were studied as 2 doses – Pfizer as 2 doses separated by 21 days and Moderna separated by 28 days—so the information we have about how well these vaccines work is based on people receiving both doses.

Q: What happens if I get only 1 dose of Pfizer or Moderna vaccine?

The FDA and CDC state that both doses are need for full immunity and no one should consider themselves protected with only 1 dose. You may not develop protection, or your partial immunity may also go away after some time and you could still be at risk for contracting severe disease associated with COVID-19. Thus, it is essential to get your second dose as soon as it can be scheduled. At the same time, because there are limited doses available, it is possible that the scheduling of a second dose may be delayed by up to a few weeks; this is ok as long as the second shot does happen—see below.

Q: I heard some countries are spacing out the timing for the 2nd dose of the Pfizer or Moderna vaccine. Can I wait?

Some countries like the United Kingdom are delaying the second dose of the vaccines for weeks or months beyond what is recommended by the manufacturers. The best data we have comes from the clinical trials in which the second dose was scheduled at 21 days (Pfizer) or 28 days (Moderna). We have limited knowledge about how efficacy or side effects may be affected by delaying the second dose, so the current recommendations from the FDA and CDC are that people get the second dose as close to the intended time as possible. However, most experts believe that very short delays (up to a few weeks) if unavoidable because of vaccine supply will still work well. One of the significant advantages of the J&J vaccine is that it requires only one dose and is thus much easier for people to complete.

Q: Will the vaccines protect against the new variants of the virus from South Africa, the UK and Brazil?

Several new strains of coronavirus that have several mutations that help it spread more easily from person to person have been identified around the globe and these are now commonly found in the US> In addition to being more easily spread, there is some concern that some of these variants may also cause more severe disease and can infect people who were infected with the original strain. Fortunately, scientists believe that the current vaccines will work against this strain and probably the best strategy we have to control these strains and prevent new ones from emerging is to get the population vaccinated as quickly as possible with any of the available vaccines.

Q. How well does the J&J vaccine work against the new variants?
Efficacy against new variants of coronavirus is one of the critical vaccine-related questions as these variants become more widespread. We don’t have a full picture of the efficacy of the J&J vaccine against different variants (UK, South Africa, Brazil) but available data suggest that like the mRNA vaccines in use, the J&J vaccine provides protection but at a slightly reduced level compared to the initial circulating strains. The most direct evidence comes from ENSEMBLE 3 trial participants in South Africa, where the B.1.351 variant was circulating widely during the trial (95% of South African participants had the B.1.351 strain). Efficacy against moderate and severe disease was 64%, but importantly the protection against hospitalization and death remained complete (though smaller numbers of these events preclude a more definitive conclusion). As such, the J&J vaccine is likely to contribute to a reduction in the risk of spread and emergence of new variants.

Q: Do you need to quarantine from family if you receive the vaccine?

No. There is no active virus in any COVID vaccine so quarantine after receiving the vaccine is not necessary.

Q. How well does the J&J vaccine protect against transmission?
The J&J vaccine trial contained an explicit secondary outcome of asymptomatic SARS-CoV-2 infection. Diagnosis of infection was based on either PCR positive result or seroconversion without illness meeting COVID-19 definitions. Not all of this data is complete as the seroconversion data is reported from only a subset of participants (the remainder had not yet completed the required time period for inclusion the time of analysis). Vaccine efficacy was measured at two time points: 29 days and after 71 days. At 29 days there was very limited and non-significant impact on transmission. At 71 days, in the vaccine group there were 10 asymptomatic cases per 3098 person years and in the placebo group there were 38 cases per 3061 person years, resulting in vaccine efficacy of 74% (95% CI 47-88%). This is extremely encouraging and is an effect that should contribute significantly to reducing transmission. It is notable that there is emerging evidence that the mRNA vaccines from Pfizer and Moderna may also significantly reduce transmission from Israel and the UK.

Q: Are there pediatric vaccines coming?

According to the Food and Drug Administration, the Pfizer vaccine can be given to people 16 years and older. The Moderna and J&J vaccines are only for adults 18 years and older. There are ongoing studies involving children age 12-15 years so we may learn more about how well they work and if they are safe in that age group. It is unlikely that a vaccine for younger children <12 will be available any time in the first half of 2021, but experts believe that we can control the pandemic without needing to vaccinate small children.

Q. I heard about a delay in the J&J trial because of a serious event in a participant—is this something I need to know about?
The J&J phase 3 trial in the US was paused in September while an independent data safety monitoring board (DMSB) reviewed a serious adverse event in a participant. The case was described in the FDA documentation as a 25-year-old previously healthy vaccine recipient who developed cerebral sinus thromboses. Here is how they described the conclusions from the DSMB:

After thorough investigation and expert consultation no clear cause of the event was identified; however possible contributing factors, such as preceding infection and an anatomical anomaly, were suggested. The investigator’s brochure and informed consent form were updated accordingly, and the study pause was lifted. The investigator and Sponsor’s final assessment of this event was that it was not related to the study product.

The FDA documents describe a number of other events related to hypercoagulation, but such events occurred with essentially equal frequency in the placebo group.

Q: Can the vaccines cause COVID-19? How do they work?
The Pfizer and Moderna vaccines do not contain whole virus so they cannot cause COVID-19. The vaccines consist of mRNA that cause your body to make a protein that is on the surface of the virus and your body makes an immune response to this protein. The vaccine is basically telling your immune system what to watch out for and to be prepared to respond quickly if it ever sees the real thing. “mRNA” often makes people think of “DNA” and wonder if the vaccines interact with our genes: they do not! mRNA works in a completely different part of our cells. The J&J vaccine is made using a cold virus that has had its ability to replicate removed. All the vaccine virus can do is make copies of the COVID spike protein for your body to recognize, and it is eliminated from the body after a short time.

Q: How many COVID-19 vaccines are currently under development?

As of March 3, more than 20 vaccines have begun and 6 have completed large-scale (Phase 3) clinical trials around the world and have been authorized in some countries. There are nearly 70 vaccines in various earlier stages of development. In addition to the Pfizer, Moderna and J&J vaccines, a few others have already been authorized in other countries, including the AstraZeneca vaccine in the United Kingdom. It is likely that 2 more new vaccines will seek authorization by the Food and Drug Administration in the US in the first quarter of 2021.

You can keep track of which trials are going on and where they stand from several websites. Here are two good examples:

Q: How do I report a problem or bad reaction after getting a COVID-19 vaccine?

The CDC and FDA encourage the public to report possible adverse events to the Vaccine Adverse Event Reporting System (VAERS). This national system collects these data to look for adverse events that are unexpected, appear to happen more often than expected or have unusual patterns of occurrence. Learn about the difference between a vaccine side effect and an adverse event. Reports to VAERS help the CDC monitor the safety of vaccines.

The CDC has also developed an additional way of communicating concerns about vaccine adverse reactions called V-safe. V-safe is a smartphone-based tool that uses text messaging and web surveys to provide personalized health check-ins after you receive a COVID-19 vaccination. Through V-safe, you can quickly tell CDC if you have any side effects after getting the COVID-19 vaccine

Q: If I am or might be pregnant, should I get the COVID vaccine?

Pregnant women are at increased risk of severe disease when they get COVID-19 and the FDA and CDC have stated that pregnant women may receive the Pfizer or Moderna vaccines. It is likely that a similar endorsement of the J&J vaccine will come from the CDC soon. However, because the trials did not enroll pregnant women, at the present time it is not possible to say if there are additional safety concerns for pregnant women, or if the vaccine will work as well as it does in people who are not pregnant. There are no specific reasons to believe that an mRNA vaccine like the Pfizer or Moderna COVID vaccines or the adenoviral vector vaccines like the one from J&J would pose a risk to a pregnant woman or the fetus, but any certainty about safety in pregnancy will have to wait for future study. There is no evidence that any of the COVID-19 vaccines have any impact on fertility.

If you are or might be pregnant, you are encouraged to discuss with your doctor if you have questions; CDC information is also available here. It is not necessary to have a pregnancy test before receiving your vaccine. It is recommended that pregnant women avoid medications such as ibuprofen (Advil, Motrin) or Naproxen. Therefore, if you are or might be pregnant, it is important that you only use acetaminophen (Tylenol) for any symptoms that might arise after vaccination.

Q: Is the vaccine safe if I am breastfeeding?

Breastfeeding mothers were not enrolled in the Pfizer, Moderna or J&J vaccine studies, and therefore we do not know with certainty the safety of the vaccine in this scenario or any impact on lactation. However, there is no specific reason to suspect that the vaccine or any of its components would enter breast milk or be harmful to your baby. If you have questions or concerns, you are encouraged to speak to your doctor; further information is also available from the American Academy of Pediatrics. And CDC information is also available here.

Q: Can I receive the vaccine if I am immunocompromised?

The COVID-19 vaccine was not studied in immunocompromised individuals, though the vaccine studies did have some participants with HIV infection. While it is not expected to be harmful to individuals who are immunocompromised, we do not yet know if it will be as effective in this population. Because each immunocompromised patient can have different health issues, we recommend that those who are immunocompromised discuss the risks and benefits with their primary provider. CDC information is also available here.

Q: Should I get vaccinated if I already had COVID-19?

Yes. The CDC currently recommends vaccination for people who have had COVID-19 as long as they have fully recovered and are no longer required to self-isolate.

Q: I have heard about severe allergic reactions to the vaccine. What do I need to know about that?

Severe allergic reactions were not observed in the vaccine studies but have occurred in a small number of individuals since the vaccine has been administered more widely. These events occurred in people with a history of severe allergy reactions. We are asking everybody who has had a severe allergic reaction (including to food or medications) that required medical treatment to stay in the post-vaccine waiting area for 30 minutes after the vaccine and to inform our staff immediately if there are any worrisome symptoms arise.

Q: Can I receive the vaccine if I have a severe penicillin allergy? What about eggs?

Yes. There is no cross-reactivity between the penicillin antibiotics and the vaccine. The Pfizer and Moderna vaccines are not manufactured using eggs so can be received by those with egg allergies.

Q: What are the ingredients in the vaccines?

The Pfizer and Moderna vaccines have a simple formulation and contain few ingredients, including the mRNA, a lipid capsule that protects the mRNA until it reaches our cells, sodium and potassium salts and other buffers to balance the pH to match our bodies, and sugars to help the vaccine stay effective at room temperature. Links to the precise ingredients in the Pfizer and Moderna vaccines are available. The J&J vaccine contains the replication-incompetent viral vector as well as some preservatives and buffers to keep it stable at lower temperatures. The link to the precise ingredients for J&J is here.

Q: Is it recommended to administer the COVID vaccine to any person who has received the flu shot this season?

Yes, everyone who received the flu shot can get the COVID vaccine.

Q: Is there any risk because of the extreme cold that the Pfizer vaccine requires for storage?

No. This vaccine must be fully thawed to room temperature in order to prepare it for administration. While the long-term storage needs of this vaccine vary from those we normally administer, once the vaccine is brought to normal temperature range and prepared, the administration process is the same as other vaccines.

Q: Would you suggest preventive acetaminophen or an anti-inflammatory (for example, ibuprofen) prior to vaccine administration?

No. In the clinical trials, these medications were not allowed prior to vaccination as they theoretically could lessen the immune response to the vaccine.

Q: Can they guarantee no tissue damage with vaccine administration in relation to the subzero temperature of the vaccine?

This vaccine will be brought to normal refrigeration temperature prior to administration. While the long-term storage needs of this vaccine vary from those we normally administer, once the vaccine is brought to normal temperature range and reconstituted, the administration process is the same as other vaccines.

Q: Do we know how long the vaccine is effective for? Will we have to get it every 6 months or every year?

The vaccine trials have demonstrated effectiveness through 6 months. They will continue to have more information on this and we will make that information available to all staff.

To ask questions not found on the FAQ, please email

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