Changing the definition of 'fully vaccinated' to include a third dose of vaccine could be difficult. A woman here waits for the Covid-19 booster vaccine in Burlingame, California, on December 4 ...

False Positives McAfee included code in its VDF (virus definition file) that identified clear files as being infected by a virus.

Michigan counts those “who are 30 days out from their onset of illness” as recovered. The definition reflects the disconnect between data and real life underscores both the shortcomings in ...

Ohio will launch a program to gather data on close contact for the coronavirus, to explore whether wearing a mask can change the definition of "close contact," and reduce the number of students ...

As nations around the world loosen coronavirus restrictions, people are discovering that “the new normal” is anything but.

The change by the Centers for Disease Control and Prevention is likely to have its biggest impact in schools, workplaces and other group settings where people are in contact with others for long ...