Matthew S. Schwartz

Author's posts

CDC cuts the recommended isolation and quarantine periods for coronavirus infections

People who test positive need to isolate themselves for 5 days if they don’t show symptoms. The change reflects “what we know about the spread of the virus” and vaccine protection, the CDC chief says.

Trump’s Doctor Says There’s No ‘Actively Replicating Virus’ — So Is He COVID-19-Free?

Doctors say people who have had COVID-19 can test positive but no longer be contagious. Trump’s doctor said Trump is “no longer a transmission risk to others” but did not say if Trump tested negative.