Rapid Spread of Delta Coronavirus Variant Delays U.K.'s Full Reopening

Upswing in cases of a more contagious variant highlights how the virus can spread even within highly vaccinated populations, providing a cautionary lesson.

Rapid Spread of Delta Coronavirus Variant Delays U.K.'s Full Reopening
Upswing in cases of a more contagious variant highlights how the virus can spread even within highly vaccinated populations, providing a cautionary lesson.