Vaccinated People Should Be Tested After Exposure Even Without Symptoms, C.D.C. Says
He Was Coughing Up Blood. But His Lungs Looked O.K.
Covid Variant Adds to Worker Anxieties
C.D.C. Says Some Vaccinated Americans Should Wear Masks Again
As Infections Rise, C.D.C. Urges Some Vaccinated Americans to Wear Masks Again
The C.D.C. will recommend that some vaccinated people wear masks indoors again.
As Virus Cases Rise, Another Contagion Spreads Among the Vaccinated: Anger
What to Know: Breakthrough Infections
Medical Groups Call for Vaccine Requirements for Health Care Workers

