Tweet from DrTomFrieden at December 24, 2021 at 09:38AM
Before gathering indoors for the holidays, consider getting tested for Covid. Remember: it can take days after exposure to become infectious. You can test negative in the morning and positive later, so consider multiple day testing and test immediately before your gathering.
— Dr. Tom Frieden (@DrTomFrieden)
Dec 24, 2021
from http://twitter.com/DrTomFrieden