If you receive a vaccine that requires two doses, you should get your second shot as close to the recommended interval as possible. You should not get the second dose earlier than the recommended interval. Additional primary doses are not interchangeable. If you are 18—64 years old and work or reside in high-risk settings, or if you are ages 18—49 years with certain underlying medical conditions , you may get a booster shot based on your individual risks and benefits.
You may have a preference for the vaccine type that you originally received, and you may prefer to get a different booster. You may consider the benefits and risks of each product and discuss with your healthcare provider which COVID vaccine product is the most appropriate booster for you. You should get your second shot as close to the recommended 3-week or 4-week interval as possible. There is currently limited information on the effectiveness of receiving your second shot later than 6 weeks after the first shot.
However, if you receive your second shot of COVID vaccine at any time after the recommended date, you do not have to restart the vaccine series, and you can be considered fully vaccinated 2 weeks after getting your second shot. This guidance might be updated as more information becomes available. Recent studies show that protection against the virus may decrease over time. This reduction in protection has led CDC to recommend certain groups get a booster shot at least 6 months after completing their initial vaccination series.
Experience with other vaccines has shown that the way our bodies develop protection, known as an immune response, and possible side effects after getting vaccinated are generally the same when given alone or with other vaccines.
Learn more about the timing of other vaccines. Evidence is emerging that people get better protection by being fully vaccinated compared with having had COVID Talk to your doctor if you are unsure what treatments you received or if you have more questions about getting a COVID vaccine. CDC will keep the public informed as new evidence becomes available.
People with COVID who have symptoms should wait to be vaccinated until they have recovered from their illness and have met the criteria for discontinuing isolation; those without symptoms should also wait until they meet the criteria before getting vaccinated. People who have had a known COVID exposure should not seek vaccination until their quarantine period has ended to avoid potentially exposing healthcare personnel and others during the vaccination visit.
For adults 18 years and older, CDC does not recommend one vaccine over another. Widespread vaccination is a critical tool to help stop the pandemic. TTS is a serious condition that involves blood clots with low platelet counts. This problem is rare, and most reports were in women between 18 and 49 years old. For women 50 years and older and men of any age, this problem is even more rare. Learn more about your COVID vaccination , including how to find a vaccination location, what to expect at your appointment, and more.
If you need a new vaccination card , contact the vaccination provider site where you received your vaccine. Valid proof of COVID vaccination can only be provided to individuals by legitimate providers administering vaccines. Posting content that includes your date of birth, healthcare details, or other personally identifiable information can be used to steal your identity. Skip directly to site content Skip directly to page options Skip directly to A-Z link.
Section Navigation. Important update: Healthcare facilities. Learn more. Learn more about getting your second shot. Get helpful tips on how to reduce any pain or discomfort.
It takes time for your body to build protection after any vaccination. You should keep using all the tools available to protect yourself and others until you are fully vaccinated. Watch Video. Skip directly to site content Skip directly to page options Skip directly to A-Z link. Healthy Living. Free information and materials in other languages, to print and share. Since receiving the first inquiries in , CDC-INFO has responded to more than : 3,, telephone inquiries and , pieces of correspondence.
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