Delta deadliest among COVID-19 variants, say CCMB scientists. Five different SARS-CoV-2 variants were chosen and scientists ...

The United States on Sunday reached 800,000 coronavirus-related deaths, according to a Reuters tally, as the nation braces ...

Well over a dozen COVID-19 cases have been connected to an outbreak involving a wedding, according to the local public health unit. The outbreak, declared Tuesday by the Windsor-Essex County Health ...

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 ...

Prior COVID-19 vaccination did not stop the immune system from mounting a protective response to the Delta and Omicron strains, though new mutation-specific antibody production dipped slightly, ...

Brett Sutton says it’s of ‘significant concern’ and it has international authorities worried - but what is the dreaded new ...