COVID-19 Vaccine Frequently Asked Questions


Xổ số chủ nhậtYou may have questions about the COVID-19 vaccine. Below are answers to the most common questions.

When can I get vaccinated?

  • The first groups of people to receive the vaccination include health care workers, first responders, and people in nursing homes.
  • Then the vaccine will be given to essential workers like those who work in food services, manufacturing, law enforcement, education, transportation, corrections, and emergency response.
  • Adults with underlying medical conditions and people over 65 are the third group to get the vaccine. After  that, it will be available to others.


How do we really know if COVID-19 vaccines are safe?

  • COVID-19 vaccines have met all the safety milestones set by the U.S. Food and Drug Administration (FDA) for emergency use authorization. The FDA safety review procedures are no different for COVID-19 vaccines than for other vaccines and drugs.
  • Nearly 74,000 people were part of the first clinical trials for safety and effectiveness, and studies found no serious safety concerns for those who received it.
  • The vaccine is safe and effective for adults of different ages, sexes, races and even for some people with underlying health conditions.


Is the vaccine that helpful? I heard having COVID-19 gives you better and longer immunity than the vaccine. What happens if I get COVID-19 anyway?

  • Getting the COVID-19 vaccine is a much safer choice.
  • If you get COVID-19 you risk giving it to loved ones who may get very sick. We know COVID-19 can cause serious illness and death.
  • Like a flu shot, this vaccine may also keep you from getting seriously ill if you are infected with COVID-19.
  • If you get the virus, the antibodies give short-term immunity of three months or less. Vaccination may provide longer-term immunity.
  • Keep in mind, the vaccine is not a perfect fix. You will still need to practice other precautions like wearing a mask, social distancing, handwashing, and other measures until public health officials say otherwise.


What are the side effects? I read that people feel awful after they get the vaccine. Can getting it cause you to get very sick?

  • The likelihood of side effects is low. When they happen, they end quickly on their own.
  • The most severe side effects reported were fatigue and headache.
  • Other, less common side effects include:
    • Fever and body aches that may last for a day or two after getting the vaccine
    • Red, sore arm or pain at the injection site for about a week
  • These types of side effects are a sign that your immune system is doing exactly what it is supposed to do—working and building up protection to disease.


How do we know these vaccines are safe when they are so new? Couldn’t they cause problems that we don’t know about yet? What about long-term issues? 

  • Both this disease and the vaccine are new. We don’t know how long protection lasts for those who get infected or those who are vaccinated.
  • COVID-19 vaccines are being tested for safety in really large studies—more than 70,000 people have volunteered for these studies so far.
  • It does take time and more people getting vaccinated before we’ve had a chance to learn about very rare or really long-term side effects.
  • Like other drugs, FDA requires safety monitoring after approval.  Studies to understand if the vaccines are safe for specific groups, such as pregnant women and children under 16-years old, are happening now.
  • If there is a safety issue, FDA and the Centers for Disease Control and Prevention (CDC) will look into it immediately, determine if it is vaccine-related, and, if necessary, change how the vaccine is used.


How many doses are needed and why?

  • Nearly all COVID-19 vaccines being launched in the United States require two shots.
  • The first shot starts building protection. Everyone must come back a few weeks later for the second shot to get the most protection the vaccine can offer.



Even after receiving the vaccine it is still important to continue following CDC guidelines for wearing a mask, social distancing, handwashing, and other hygiene measures until public health officials say otherwise.


If you have additional questions, see the CDC’s . This site is regularly updated with answers to common questions.





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