The internal CDC document said the Delta variant was more transmissible than the viruses that cause MERS, SARS, Ebola, and the seasonal flu.

"The rules have changed. We have a different epidemic now that we did in May." Adding more insight into the CDC’s updated mask guidance, newly published details of the Provincetown outbreak raise ...

More than half of the U.S. population has received at least one dose of the coronavirus vaccine. But based on a new scenario model by Johns Hopkins the next three months are crucial if we want to ...

A survey for the Wall Street Journal found small business confidence is at its lowest level since March as COVID-19 cases rise.

PHILADELPHIA (WPVI) -- New numbers are shedding light on just how quickly the Delta variant of COVID-19 is spreading in the United States. The more contagious Delta variant now makes up 83% of ...

Estimates show the variant accounts for over 51% of all new cases nationwide. A highly contagious variant of the novel coronavirus that was initially identified in India is now the dominant strain in ...

During the delta and omicron variant time periods, vaccination against severe acute respiratory syndrome coronavirus-2 ...