Testing positive for COVID-19 is not exactly a positive experience. After all, wanting to go viral these days doesn’t tend to mean wanting to be infected by the severe acute respiratory syndrome ...

As the nation experiences what many experts believe is the second-largest wave of COVID infections since the pandemic started, many Americans will be checking to make sure they don’t have the ...

A PCR test detects the actual genetic material of the virus and involves a step that amplifies the presence of any material ...

In ancient Greece, the physician Hippocrates is said to have theorized that the ratio of four bodily fluids—blood, yellow bile, black bile, and phlegm—dictated a person’s distinct temperament. The ...