If a test is delivered to you on a sweltering day, for example, the agency recommends bringing the package inside and waiting at least two hours before opening it.
And always make sure the control line — which typically appears next to the “C” — shows up when you use a rapid test; otherwise, the test may be damaged or faulty.
If you have Covid symptoms and someone you had been spending time with is now positive, test immediately.
says to wait at least five days before testing because swabbing too early can give you a false negative.
“Especially people who have been recently boosted,” he said, “if they get infected, they might become symptomatic 24 hours post-exposure, 48 hours post-exposure — really fast.”
Persons:
Peter Chin, Sala, . Chin, Hong, Michael Mina, Harvard epidemiologist, ”
Organizations:
University of California, Harvard
Locations:
San Francisco