The Delta variant, also referred to as a "double mutant" because it carries two mutations, is 55 per cent more transmissible ...

NEW YORK -- As Americans brace for the possibility of another difficult winter ahead in the nation's fight against coronavirus, there is a renewed sense of urgency to get as many people inoculated and ...

With the more contagious delta variant strain of COVID-19 spreading throughout the country, hospitalizations and deaths from the virus are on the rise. According to the Centers for Disease Control and ...

Vaccine breakthrough infections occur when individuals contract SARS-CoV-2 despite completion of an authorised immunisation schedule. These events have risen in prominence as viral variants acquire ...