Originally Posted by
the810
Booster is not necessary if you got your second dose in last 270 days (that was mentioned in the first answer). But if you were vaccinated in early 2021, you do need a booster.
I never got a 2nd dose. I got a single dose of Janssen (J&J) 3 weeks ago, which is a single-dose vaccine. There is no 2nd dose and it's far too early for a booster.