Pfizer is reportedly expected to request the FDA for emergency authorization for a fourth...
subvariant
The pharmaceutical company requested authorization for another shot for older Americans, saying it dramatically...
The new omicron subvariant, BA-2, is at least 30% more transmissible and accounts for...
The CDC estimated that BA.2, a subvariant of omicron, nearly doubled every week in...
The World Health Organization has asked countries to keep an eye on the new...
