It varies. But the general opinion is they are good for at least 6 months.
Answered 3/30/2022
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At present it looks like boosters are required every 6 to 8 months but at present we have research showing that a second booster is advisable in the over 65s and over 55if immunocompromised. Good Luck
Answered 3/30/2022
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2 doctors weighed in across 2 answers
2 doctors weighed in across 2 answers
2 doctors weighed in across 2 answers
2 doctors weighed in across 2 answers
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