Where new cases of the Delta variant of COVID-19 came from remains a mystery - but it has been revealed two Australians had it before the current infections.

Health officials questioned on the Delta variant With concerns mounting about the Delta variant, provincial leaders and health officials respond to questions about its potential impact.

A new CDC report warns the Delta variant is one of the most contagious viruses that exist, with each infected person passing it to 8 or 9 others. The delta coronavirus variant surging across the ...

The Delta variant is already the dominant strain of COVID-19 in the United States, according to data modeling done by the U.S. Centers for Disease Control and Prevention (CDC). According to the health ...

SARS-CoV-2 possesses a characteristic surface protein, the spike protein, which plays a central role in viral entry into host cells. The evolution of spike protein mutations has been an important ...

I believe it's here,” University at Buffalo biochemist Jennifer Surtees said about Omicron in Western New York on Saturday, “and we just need to get the sequence data to back ...