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Frequently asked questions
Here are 5 reasons to get a COVID-19 vaccine—even if you're young and healthy:
- Data shows that younger people are getting sick from the virus that causes COVID-19. Young Black and Hispanic people are at increased risk. This increased risk is due to racial health inequities and other factors that can affect a person's health. These include factors like the environment where the person lives or their ability to access health care.
- Some people report long-term effects of COVID-19. Most people get better in weeks. But some people have effects that last for a longer time. These effects may include symptoms like dizziness, depression, or feeling very tired. They may also include effects on vital organs like your heart or lungs. The effects can happen even after a mild illness.
Learn more about long-term COVID-19 effects on the CDC website
- When you get a COVID-19 vaccine, you help protect your family, friends, and community. When enough people in a community get the vaccine, the community builds up immunity to the virus. This makes it harder for the virus to spread from person to person. And it protects those who can’t get a vaccine (like small children). We call this “community immunity.”
- After you’re fully vaccinated, you can start to do more. This may include visiting with family. It may include not having to wear a mask except where required by law or other rules. It may also include traveling without the need for a COVID-19 test.
Read the CDC guidelines for after you’re fully vaccinated
- You can get a free COVID-19 vaccine—even if you don’t have health insurance.
Find out how to get a COVID-19 vaccine at VA
Find COVID-19 vaccines near you on the CDC website
Here’s how we know that COVID-19 vaccines are safe:
- Scientists studied COVID-19 vaccines in tens of thousands of people in clinical trials. These trials showed no serious safety concerns. The trials included people of all ages, genders, races, and ethnicities. About 30% of people in the U.S. trials were Asian, Black, Hispanic, or Native American. About 50% of people in the trials were older adults.
- All the current vaccines have met the Food and Drug Administration’s (FDA) high safety standards. Before the FDA authorizes a vaccine for use, they review all safety data and clinical trial results. They also review the process a company uses to make the vaccine. They make sure the process follows quality and safety standards.
- Millions of people in the United States have now received COVID-19 vaccines. Serious safety problems are rare. The monitoring systems have found only 2 serious health problems after vaccination. Both of these health problems are rare.
Learn more about these rare problems on the CDC website
- COVID-19 vaccines continue to undergo the most intense safety monitoring in U.S. history. The FDA and CDC respond right away if data shows a vaccine may cause health problems—no matter how rare.
COVID-19 vaccines continue to undergo the most intense vaccine monitoring in U.S. history. The pause of the Janssen COVID-19 vaccine in April 2021 shows how well this system works.
A very small number of people who received the Janssen vaccine experienced rare but serious blood clots with low platelet counts. Platelets are tiny cells in your blood. They help your blood form clots to stop bleeding.
CDC and FDA experts recommended a pause in providing this vaccine right away. They did this to give them time to study the issue. They then carefully reviewed these cases and all available data. Based on this review, they're confident that this vaccine is safe for use and works well to prevent COVID-19.
The available data shows:
- The vaccine's benefits outweigh its risks.
- The chance of blood clots after getting this vaccine is very low. The risk is higher in women between the ages of 18 and 49. About 7 of every 1 million women in this age group who have received this vaccine have experienced these blood clots. For women who are 50 years old or older, and men of all ages, they’re even more rare.
- Women younger than 50 years old should be aware of their increased risk for these rare blood clots.
- People who've had another rare immune response that causes blood clots and low platelet counts (such as heparin-induced thrombocytopenia) within the past 90 days shouldn't get the Janssen vaccine. They should get either the Pfizer-BioNTech or Moderna COVID-19 vaccine instead.
If we offer you the Janssen vaccine, we'll give you information about the potential risks and benefits. This includes the rare risk of blood clots. We'll also tell you about your other vaccine options. If you have questions about this vaccine, contact your primary health care provider.
Here's what you should know about how scientists created and tested COVID-19 vaccines so quickly:
- They built on earlier work. Scientists have been studying vaccines for more than 100 years. Scientists have been studying the technology for mRNA vaccines for more than 20 years. And the National Institutes of Health (NIH) was working on creating a coronavirus vaccine even before the COVID-19 pandemic.
- They got the funding they needed to work quickly. The COVID-19 pandemic is a public health emergency. So the U.S. government invested millions of dollars to help study and test vaccines.
- They used a faster review process with all the same steps. The FDA authorized the current COVID-19 vaccines under their Emergency Use Authorization (EUA). An EUA follows the same steps that full-term clinical trials take. This includes testing each vaccine on thousands of human participants. The only difference is that an EUA speeds up the FDA’s review process. This helps get critical vaccines to people faster while still making sure the vaccines are safe and that they work well.
- They involved many experts in reviewing data. Independent groups also reviewed trial results to make sure the vaccines are safe. These include groups like the National Medical Association, the leading professional society of Black doctors.
The FDA continues to monitor COVID-19 vaccines even after they’re approved.
Scientists studied COVID-19 vaccines in tens of thousands of people in clinical trials.
The trials included people of all ages, genders, races, and ethnicities:
- About 30% of U.S. trial participants were Asian, Black, Hispanic, or Native American.
- About 50% of trial participants were older adults.
Studies show that COVID-19 vaccines work well in these ways:
- Vaccines help protect you from getting COVID-19.
- Even if you get COVID-19, vaccines help protect you from getting seriously ill.
Scientists continue to study these vaccines as millions of people get vaccinated. For example, one study reviewed how well the Pfizer-BioNTech and Moderna COVID-19 vaccines protected health care and other essential workers. These groups are at high risk of infection with the virus that causes COVID-19. The study showed that people had a 90% less risk of infection 2 weeks after they were fully vaccinated.
We’re still learning about how long vaccines protect you from COVID-19. We’re also still learning how well vaccines protect you from spreading the virus that causes COVID-19. Early data shows that vaccines do help keep people with no symptoms from spreading the virus.
COVID-19 vaccines offer good protection against the variants we know most about. And widespread vaccination can prevent deaths and hospitalizations from COVID-19.
Current vaccines may not offer as much protection against future variants. But with the new types of vaccines that we have now, we can adjust the vaccines to fight new variants. Until we achieve high levels of vaccination around the world, we expect more variants to arise.
Here’s what we know about the new variant called the “Delta variant” that’s now spreading across the U.S.:
- The Delta variant spreads more easily and quickly than other variants.
- The CDC reports that some of the medical treatments we use to treat COVID-19 may not work as well against this variant.
- People who haven’t gotten a vaccine—or have only gotten their first of a 2-dose vaccine series—are at highest risk. Getting your second dose is critical. There are reports of people who’ve received only one dose and got very sick from COVID-19.
No. mRNA vaccines that protect you from COVID-19 don’t alter your DNA. These vaccines work outside of your cell’s nucleus (where your DNA is kept). The vaccines teach your cells how to make a protein that triggers an immune response. Your cells then break down the mRNA and get rid of it soon after they’ve finished using the instructions.
No. The current COVID-19 vaccines, and the vaccines still in development, use one of these methods:
- An inactivated virus
- A harmless piece of the virus
- A gene from the virus
None of these can cause COVID-19.
Yes. The CDC and other experts strongly recommend that people who are pregnant, planning to become pregnant, or breastfeeding get a COVID-19 vaccine.
Pregnant people are at increased risk of severe illness from COVID-19. Severe illness may mean having to go to the hospital, needing a ventilator to breathe, or having an illness that results in death. Pregnant people also have an increased risk of preterm birth.
COVID-19 vaccines can help protect you from COVID-19. And experts believe that COVID-19 vaccines are safe for people who are pregnant, planning to become pregnant, or breastfeeding.
A lack of transparency and consent was a major issue in past research abuses. The Tuskegee Study is one of the most well-known examples. This was a study of syphilis conducted on Black men between 1932 and 1972. In the study, researchers gave participants false information. They also withheld effective treatments. Participants couldn’t make informed decisions about their own health.
After this study, the U.S. government made changes to help prevent future abuses. Today, we have strong laws to protect the safety of every person who joins a study (or clinical trial). For example:
- Researchers must follow strict rules to make sure that all participants are safe.
- Each trial must follow a careful study plan. The plan balances potential benefits and risks to participants. The plan also makes sure the trial aims to answer specific research questions.
- For most trials, a group of health care providers, scientists, and community members approve and monitor the trial. This group reviews the research to help protect participants’ rights.
- Researchers must explain how the trial works, and any risks, to each person before they agree to join.
The COVID-19 vaccine trials followed the highest ethical standards.
Remember: It’s always your choice to decide if you want to get a vaccine. We want to give you all the information you need to make an informed choice. Our goal is to provide you with safe and effective care. Your decision won’t affect your care or benefits in any way.