They didn't catch it at the signing ceremony and test positive the next day.
Test them again in 2 days.
Where were these same people a week ago?
No secret Bidens now touting Covid as his platform.....so natural the media are looking everywhere to throw balls at this administrationand give Biden talking points. Tere’s nothing else he can run on.
Typically takes around 3 days after infection for sufficient amounts of viral material to be reliably detectable. On day 1, the current “gold standard” PCR test is ~90% false negative on day 1.