FAQs

Frequently Asked Questions

General Questions

The vaccine is an injection or shot. You will need two shots for both of the EUA approved vaccines. The Pfizer vaccine is given 21 days apart. The Moderna vaccine is given 28 days apart. You are not fully vaccinated until you receive both doses (two shots). If you miss the 21/28-day window, you do NOT need to start all over again.

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Yes! These vaccines are effective and have been shown to significantly reduce your risk of getting sick with COVID-19. The risk decreases very quickly. Results from the Pfizer vaccine have shown that within 10 days of receiving the 1st shot, your risk of COVID significantly decreases. This is the same regardless of sex, race, age, or weight.

But that first dose is only 52% effective on its own. That’s why you need to get that second dose to get to the 95% effectiveness that everyone is talking about.

AND: you will still need to continue precautions for awhile longer. No vaccine protects 100% of the time. People will still have to minimize risk by wearing a mask, social distancing and washing hands.

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The clinical trials for both Pfizer and Moderna thus far indicate no difference in efficacy by age with the vaccine.

It is unclear at this time what the effect of various immunosuppressant medications will be on the vaccine.

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At this time, we are not entirely sure how long it will last. Please stay tuned and we will update with more information as it comes!

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This is a really great question and one many are already discussing given vaccine shortages. Currently it is recommended that you receive the two doses of the Pfizer vaccine 21 days apart. If you miss the 21 day window, you do NOT need to start all over again.

We do not know how this will affect efficacy at this time but will keep updating with recommendations from scientists and public health advocates based efficacy data we have!

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No! In fact, what is really great is that the Pfizer vaccine has been shown to cause a 52% efficacy with the first dose alone — and within 10 days of the dose! That is really incredible!

Still — you do not get that 90+% efficacy until you get the second dose; so please make sure to follow-up with your second dose; and always wear a mask, maintain social distancing and wash your hands!

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This is a great question! Currently people can — and should — receive the vaccine regardless of their prior history of infection.

It is NOT recommended that you need to test for active or prior infection before getting the vacccine

Given that it appears that many people who have had COVID have immunity for at ~90 days, people who have been infected can wait until a 90-day period has passed to receive the vaccine (but they do not have to wait).

If you are actively infected with COVID, you should wait until you have recovered from your acute infection and your quarantine period is over. This is so that we protect those giving the vaccines and others at the sites where vaccinations will be happening.

If you have been exposed to someone who had COVID, you should wait until your quarantine period is over — again to protect those giving the vaccines and others at the sites were vaccinations are happening.

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That is a great question! Currently it is estimated it will cost (depending on the vaccine and insurer) anywhere from $3 to $38 per dose for the vaccines. This is the administrative fee for giving the shot and may be reimbursable by public/private insurance.

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No-there did not appear to be any negative interactions (remember, the clinical trials ran through flu season, so many participants received both). We do know that getting both the flu and COVID illnesses at the same time appears to be associated with a significantly increased risk of death, so we recommend obtaining BOTH vaccines! But you should space them apart by at least 14 days.

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Currently, for the Pfizer vaccine, it is recommended that the COVID vaccine should be administered at least 14 days before/after any other vaccine so potential reactions are not confused with reactions to other vaccines.

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We are so glad you want to get vaccinated! Please get whichever is available to you first. Both the efficacy and safety data of the Pfizer and Moderna vaccines were very comparable (neither was “better” than the other). Due to supply and/or logistical issues, one may be available to you before the other.

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Currently the vaccine trials only evaluated the efficacy of two doses of their own vaccine. The safety and efficacy was not tested for obtaining doses from different vaccines.

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No — you do not need to get both vaccines! Both of the vaccines approved by emergency use authorization (EUA), the Pfizer and the Moderna vaccines, work in the same way: they are mRNA vaccines that target the spike protein of the virus (the protein that allows the virus to enter the body’s cells). Both have very similar efficacies and very similar side effect profiles.

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At this time there is not enough data to know if there is any change in vaccine effectiveness in people who have received monoclonal antibodies or convalescent plasma. Please stay tuned for any updates to this!

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That is a really good concern. COVID19 has affected certain communities far more than others, and it is really important to ask if those communities have been part of this vaccine development as well as the safety reviews for these vaccines. In addition, we recognize that medicine historically has not treated underrepresented communities equally, and this creates legitimate distrust of the system.

In regards to the COVID-19 vaccine, scientists and advocates from very diverse backgrounds have been part of the leadership of these vaccines as well as reviewing and making guidelines and decisions regarding them. For example, Dr. Kizzmekia Corbett, who works for the National Institutes of Health, is an African-American woman who helped develop the Moderna vaccine. The safety monitoring and review boards for both the Pfizer and Moderna vaccines included scientists, physicians and advocates from diverse backgrounds representing numerous groups from all parts of the country. These hearings were also open to the public so that they could be as transparent as possible.

We fully recognize this may not be enough, but we hope that it gives some measure of comfort knowing that representation has occurred at all levels, from vaccine development through the independent safety reviews. COVID19 has been devastating and these vaccines represent the first real hope we’ve had to combat this pandemic.

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This is when a person is “hesitant” about receiving the vaccine. This can be due to many factors, such as concern about the safety and development of this specific vaccine, lack of confidence in vaccines as a whole, or a lack of education about vaccination.

This is why it’s important for all of us to talk to each other, discuss concerns, and address them as honestly as possible.

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This vaccine has been developed very quickly compared to other vaccines. This is due to the urgency of the global pandemic. However, it has been created in a way that allowed it to be safe and to be studied so that people around the world can be confident in taking it

The next step is distribution. Distribution has some challenges, including shipping, storing (some vaccines need to be kept at remarkably cold temperatures!), and administration. The millions of doses that are needed still need to be manufactured.

Finally, there will be people who do not want to receive the vaccine for various reasons — or who do not want to receive it at first but do end up receiving it later. This delay is a barrier in achieving “herd immunity,” and it may take time and patience to reach a level of 70–80% of the population becoming vaccinated

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Herd immunity occurs when a majority of the population (the “herd”) is vaccinated. When enough people are immune through vaccination, the disease is unable to spread. With nowhere to go, the virus dies out. It is then far less likely that anyone, immunized or not, will become infected with the virus. Usually, about 70%-90% of people must be vaccinated to reach herd immunity. Because these vaccines will take time to be distributed, we will need patience because it will take many months to reach this point with COVID-19.

To be clear: herd immunity is not the idea that a majority of people get sick with COVID-19 and recover. Herd immunity only applies to the COVID vaccine.

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The shot will help protect you from being infected with SARS-CoV-2 (the infection that causes COVID-19) and, even if you get infected, it will help prevent you from developing symptoms of severe COVID-19.

Getting the vaccine reduces your risk of becoming ill, seriously ill, or dying from COVID-19. The vaccine may also decrease the chance you could pass the virus on to someone else (see below).

When enough people receive the vaccine, we will reach what’s called herd immunity. Herd immunity will help protect everyone from COVID-19.

However, before we reach that point, we will still need to keep doing all the things we were already doing to protect ourselves: wash hands frequently, social distance, and wear masks.

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You can still obtain the COVID vaccine, but currently the recommendations are to wait 90 days from the time of receiving the plasma or monoclonal antibody therapy.

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No. We are still collecting data on how well the vaccines will prevent the spread of coronavirus. Some vaccinated people may get infected without developing symptoms and silently spread the disease to others. You must continue to practice social distancing, wear a mask, and wash your hands frequently. While vaccines are effective, they are not a 100% guarantee, and it will take at least several months for us to reach a point of herd immunity.

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Yes. The vaccine has been shown to decrease severe COVID-19 in those who do come in contact with the SARS-CoV-2 virus. This is incredibly important, as we know a lot of long-term damage occurs when people are sicker with COVID-19. Being vaccinated helps keep people with COVID-19 out of hospitals, which protects our health care institutions for everyone.

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No. First, the vaccine immunity takes at least 2–3 weeks after ALL doses. Also, the vaccine is not 100%. You will still need to social distance and wear a mask until we reach herd immunity.

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Yes! These vaccines are effective and have been shown to significantly reduce your risk of getting sick from COVID-19. The risk decreases within weeks of completing the vaccines; and this reduced risk is the same regardless of sex, race, age or weight.

But the first dose of either vaccine is only partially effective—that is why you need to get that second dose to reach that high effectiveness (90-95% efficacy) that has been reported.

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This is still being studied, but preliminary data from the Pfizer, Moderna and Oxford-AstraZeneca vaccines looking at asymptomatic transmission of the virus (meaning have active virus that could be spread by having no symptoms) found that it was significant decreased in those who were vaccinated.

However, we do know that not everyone responds to these vaccines; and some vaccinated people still could get infected and not have symptoms. Those people can still spread the disease to others.

Bottom line: until we reach a point of “herd immunity” or get more data on this, you still need to wear a mask, social distance and wash your hands frequently to protect yourself and others.

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We’re not completely sure how well the Pfizer and Moderna vaccines work against the various new strains of SARS-CoV-2 that are being identified.  The clinical trials for both the Pfizer and Moderna vaccines pre-dated the emergence of these new strains.  The good news is that early information from Israel indicates that the Pfizer vaccine seems to be working against the UK mutant (B.1.1.7); but we still lack evidence about the South African or Brazilian variants. 

If it is found that the vaccines are much less effective against these variants, it may be necessary to have a booster vaccine (for example; this is something Moderna has discussed).

However, regardless of these new strains, the most effective way to beat all of them is with vaccinations to achieve herd immunity; and continuing to wear a mask and socially distance: no virus has successfully mutated to beat wearing a mask!

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Safety Questions

So far, there have been less than 20 severe allergic reactions that have been reported with the Pfizer and Moderna vaccines. It is important to remember that this is out of >1 million people worldwide who have been vaccinated. In all cases, people have successfully been treated for the allergic reaction. These events are being evaluated to determine exactly what reactions have occurred and what (if any) allergies these people have had.

The CDC is currently recommended a 15-minute monitored waiting period after the vaccine; but if you have had a serious of severe anaphylaxis, they are recommending you have 30 minute monitored waiting period after your vaccine.

Additional recommendations will be forthcoming or change, so check back here!

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No! Currently there are no underlying medical conditions that preclude you from getting the vaccine. That is because getting COVID is so much worse, especially for people with underlying chronic conditions.

If you do have a significant allergy history, or believe you are allergic to any of the ingredients in the vaccine, you should let your provider know. You may be monitored more closely following the vaccine.

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Great question! The only people who should NOT get the vaccine are those with a history of severe reactions to the vaccine ingredients. Those ingredients are listed on page 2 of this document: https://www.fda.gov/media/144414/download

We do strongly recommend you also discuss your allergy concerns with your doctor!

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None of the vaccines are live vaccines. If you obtain these vaccines, you will not be able to pass COVID to someone else.

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mRNA vaccines contain no human or animal in them — they are just made with a few salts, sugar, water, a lipid capsule and mRNA.

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It appears that people who get the COVID vaccines are more likely to get some mild flu-like symptoms: sore arm, muscle aches, fatigue, GI discomfort, etc. This appears to happen a bit more with this vaccine than with (for example) the flu vaccine; and it appears to be more common after the second dose of the vaccine, and can last up to 24–36 hours.

But please remember: this is a GOOD thing! It means your body is responding to the vaccine and building up the defense you need to protect you from COVID! (Think of it like working out — you have to get a little sore to build up that muscle!)

It is absolutely fine to take Tylenol or ibuprofen (Motrin, Advil) to treat these symptoms if they occur; but it is currently NOT recommended to take those medications to prevent these symptoms before they start because it is unclear at this time if they will interfere with the antibody response and vaccine effectiveness.

And don’t worry if you don’t have these symptoms — some people do, some people do not!

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YES! The CDC is ABSOLUTELY recommending that people who are immunosuppressed or have high-risk medical problems get vaccinated. Please remember: this is NOT a live vaccine; and it does not enter the nucleus of the cell. As a result, for these patients, the vaccine poses a far less risk than getting infected with COVID19!

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This is not true. It is recommended that even if you have had COVID in the past you get vaccinated. We have not seen an increased number of autoimmune flares with either the vaccine or with COVID.

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Great question!

RNA are like post-it notes (or, for the younger crowd, Snapchat messages that expire!). At any moment, a human cell has 5000+ different RNA messages. They are read by the cells and then destroyed within minutes to hours.

Because they are temporary, they do NOT become a permanent part of your body. In fact, they do not enter the nucleus of the cell and they never interact with a person’s DNA.

These temporary RNA messages instruct the cells of the body to make proteins. In the case of the mRNA COVID-19 vaccine, they message for one single coronavirus protein: the spike protein. This is the protein that the virus needs to enter the cells. So by developing antibodies to block it, you prevent COVID!

Now: remember — it takes 25 different proteins to make a coronavirus. So your body is NOT making a coronavirus with the RNA vaccine!

It is also important to remember that tens of thousands of people have already received this vaccine and have been watched for several months now. All of this data has been reviewed by independent safety boards across the world. Safety review boards are NOT controlled by the company that makes the vaccine. The end result is a lot of safety data. In all of these reviews, no serious concerns have been found. Rather, the vaccines have shown incredible efficacy.

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Bell’s Palsy is a facial paralysis, usually on one side, that causes drooping of the face. It is usually temporary but can rarely become permanent. In the clinical trials, there were 4 cases among over 44,000 in the Pfizer trial and 3 cases in over 30,000 in the Moderna trial who developed Bell’s Palsy. This was higher than in the placebo arms of both trials. However, currently over 12 million first-doses of either the Pfizer or Moderna vaccines have been given and Bell’s Palsy does not appear to be occurring more often in the real world. It is continuing to be monitored however.

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Yes! It’s an incredible scientific achievement!  But realize—research on the technology behind the new COVID-19 vaccine has been underway for at least the past 10+ years.  We’ve had prototypes for influenza, rabies and other types of viruses.  This pandemic pushed scientists across the world to be really motivated and focused on a single virus and utilized the knowledge they already with significant resources. In the US, we had Operation Warp Speed, a federal partnership between the Centers for Disease Control and Prevention (CDC), the Department of Health and Human Services (HHS), Biomedical Advanced Research and Development Authority (BARDA), Department of Defense (DOD), and private companies to develop, manufacture, and distribute 300 million doses of the COVID-19 vaccine. It was incredibly fortunate that they picked the spike protein of SARS-CoV-2 to focus on, as it turned out this was the right protein to target!

These vaccines have been tested in clinical trials enrolling tens of thousands of people, just like other vaccines. The timeline was accelerated, but steps were not skipped. You can see the FDA briefing materials that provide a comprehensive overview of the safety and efficacy data.

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Yes vaccines can contain metals; and so do blueberries, eggs and bananas! Metals are part of nature. Your body needs certain types of metals for appropriate function; and your body can handle these micro doses of metals and excrete them appropriately — including those in the foods you eat AND in vaccines.

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People with autoimmune diseases are not expected to have “flares” after receiving the vaccine — this was not seen in any of the data reviewed from the Pfizer vaccine; and also is not seen in active COVID-19 infections

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“It was recently calculated (based on data from the Pfizer vaccine) that 1 person per every 100,000 will have a severe allergic reaction.  For this reason, everyone receiving the vaccine is monitored for 15 minutes following the vaccination; and if you have ever had a serious allergic reaction in the past, you should be monitored for 30 minutes.  It is also important to remember that allergic reactions are easily recognizable and easily treatable—no one has died from a severe allergic reaction to the COVID vaccine.

The CDC has recommended that persons with a known (diagnosed) allergy to PEG (polyethylene glycol) or polysorbate, have a contraindication to vaccination. Persons with a reaction to a vaccine, but in whom it is unknown what caused the reaction have a precaution to vaccination and may want to discuss with their physician.

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Per the CDC, a delayed local injection-site reaction after the first mRNA vaccine dose is not a contraindication or precaution to the second dose. You will also want to discuss with your health care provider.

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Timeline Questions

First — thank you for your enthusiasm to get vaccinated! You are part of the solution!

Please understand: there is a limited number of doses; and a great deal of infrastructure to get these vaccines to people across the country. It’s not just about getting that first dose — it’s critically important that people get the second dose as well! So we need to implement the infrastructure to schedule that second vaccine, send reminders, and keep track of who has gotten what — and that’s not easy with millions of people! Luckily, pharmacies are working with hospitals (as part of Operation Warp Speed) to help distribute these vaccines

The CDC and the American Committee on Immunization Practices and Protocols have been making recommendations for which groups of people should be vaccinated first based on who is at risk of spreading COVID-19 and who is at risk of dying from the disease. As you can probably guess, health care workers (doctors, nurses, technicians, staff, etc) are in the first tier. The second tier includes older adults(75 years+) and frontline essential workers (first responders, educational workers, daycare workers, food and agriculture workers, manufacturers, correctional facility staff, postal workers, public transit workers, etc).

However, every state has independent control to make their own state-specific prioritization protocol. So there will be variations by state. States have been notified about the amount of vaccine they have been given and are working on their protocols.

As more vaccine becomes available, it will move down the prioritization list and go out to the general population.

But even then, you may not be at the top of the “general population” list! People who live with the diseases that we know are associated with worse outcomes from COVID-19 (such as diabetes, lung disease, etc) may get priority.

This is not necessarily a bad thing! Consider: the more people who get vaccinated, the better for EVERYONE. First — this means your health care staff and other people around you are less likely to make you sick. Second, there is the idea of herd immunity: because this vaccine is so effective, the more people who get vaccinated, the safer EVERYONE is who hasn’t been able to get the vaccine first.

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This is a really great question. You should contact the vaccine study directly.

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Every state is working on their prioritization and state-wide distribution plans and will be conveying that information.

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The CDC has made recommendations for prioritization of the vaccine; but each state can make their own prioritization, so look to your state guidelines for when and where it will be available.

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That’s an excellent question. It does not seem likely that you will be forced to get one type of COVID vaccine versus another. However, there may be availability issues for a certain type of vaccine in a certain area.

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No, but there’s a good reason. Vaccinating those at highest risk protects ALL of us by reducing the number of cases among those most likely to be infected. This means as soon as you are eligible, you can get vaccinated — but not before.

Category: Timeline

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Vulnerable Population Questions

There are ethical problems with including pregnant women in a Phase 1 or Phase 2 study. For that reason, we have not tested the vaccine on pregnant women. However, the EUA for the Pfizer vaccine DID allow women who are pregnant or breastfeeding to opt to obtain the vaccine. This should be discussed with their primary care or OB/Gyn physician.

If a woman is considering pregnancy, it is recommended that they become fully vaccinated before becoming pregnant if they can.

Preliminary analysis from the Moderna vaccine indicates no effects on reproductive health; please do stay tuned for additional information and please also discuss with your primary care or OB/Gyn physician.

If a woman opts not to obtain the vaccine, they should do all the same things we are already doing — mask wearing, social distancing, washing hands. As a reminder: we know that COVID can be harmful to a pregnant woman and her fetus.

Because a COVID-19 vaccine is not going to be available to the general population for several months, many women may deliver their babies before they are eligible for the vaccine. It is therefore important that those around them also practice all the same precautions we have been doing (mask wearing, social distancing, washing hands); and (especially if the woman opts not to get vaccinated) consider obtaining the vaccine when it is available to them. This is similar to what we do for infants aged 0–6 months who cannot get the flu vaccine. We ask everyone who comes in contact with them make sure they are vaccinated to protect that non-vaccinated person!

The EUA for the Pfizer vaccine allows children 16 years and older to obtain the vaccine.

Only one vaccine (Pfizer) allowed children as young as 12 to get the vaccine — and there were not a lot of them.

This great article with an interview with Dr. Sallie Permar, Chairwoman and Pediatrician-in-Chief at the Weill Cornell Medical School and NYP Pediatrics, explains why studying children is so important — they are not “little adults.” Their immune systems work differently. So we will need to do trials to find out the correct doses for them.

The good news is that we already have great lessons from the existing trials — so these pediatric trials likely don’t have to be as long or as big!

However, we should get these trials done as soon as possible — because we want our children to go back to school as soon as safely possible.

Check out this article

We do not know the answers to these questions for the COVID vaccine yet. But there is some data we do have that can be helpful.

We currently do not know the answer to this. Please check back as more data becomes available on these vaccines!

This is simply not true! In fact, in the Pfizer trial, 12 women in the vaccine arm became pregnant despite signing a pledge to use 2 forms of birth control or abstinence!

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