“If you received J&J more than three weeks ago, there is little to worry about,” said Dr. Shruti Gohil, associate medical director for epidemiology and infection prevention at the University of California, Irvine. “If within three weeks, you should know that this event still appears to be rare.”
Ask PolitiFact: I got the Johnson & Johnson vaccine. Am I going to be OK?
PolitiFact, April 13, 2021
April 13, 2021