The Delta variant is contributing to a rapid rise in Covid cases in parts of Asia causing a severe strain on health infrastructure in some countries. Vaccinations rates are relatively low in many ...

With Alpha, Delta, Omicron, and more iterations, it’s normal to wonder how many COVID variants are there? Ahead, experts explain the evolution of COVID-19, and the latest variants of concern.

The Omicron variant of the coronavirus is suspected to be the most infectious yet by binding to human receptors better than the Delta variant and the team’s findings show it may have the potential to ...

It had been learned that the Omicron variant replicates faster in bronchial cells than the Delta variant, which caused the fifth wave in the summer of 2021. However, the state in which virus ...

The cohort-grouping method is problematic: the highly transmissible delta variant (B.1.617.2) became predominant in the United States over an 8-week period from May through June 2021. 1,2 ...