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A member asked:
How long does it take after the second dose of a covid vaccine (either pfizer or moderna) for immunity/resistance to the virus to build up? i've always been told it takes about 2 weeks with the flu vaccine. how long for the covid vaccine?
6 doctors weighed in across 4 answers
Immunity: It is thought that some immunity builds up about one week after the first dose and reaches a peak about two weeks after the second dose.
Answered 2/28/2021
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COVID 19 vaccine: You should reach full immunity about 2 weeks after your second dose of COVID 19 vaccine.
Answered 2/28/2021
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Agree with Dr. F&C: You are expected to be immune in about 2 weeks after the second dose. However, at this stage it is still recommended that you take usual precautions of social distancing, wearing a mask and hand hygiene. Have a healthy diet, exercise 30 minutes/day, drink plenty of water daily so your urine is mostly colorless, have safe sex, no tobacco alcohol weed or street drugs. Get HPV vaccine.
Answered 2/28/2021
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Not straightforward : The Moderna vaccine maybe effective 1 week after dose two, Pfizer two weeks, but if prior infection, maybe even earlier. Best safety do TWO WEEKS and not split hairs
Answered 2/28/2021
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Why does the first COVID vaccine give us sore arms (in some people) but then the second dose is harder to get through with flu like symptoms while others don't have much symptoms?
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