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 couple of weeks ago, my oldest daughter, who is about to turn 27, developed symptoms consistent with COVID-19: a dry cough, a sore throat, a fever, and difficulty breathing. On March 23, she went to ...

You wake up with a scratchy throat, runny nose, and persistent cough, but your at-home COVID-19 test reads negative. How is this possible? The short answer is yes—you can still be infected. Many other ...

Conventional diagnostic tests for the novel coronavirus may give false-negative results about 30% of the time, meaning people with an active COVID-19 infection still test negative for the disease, ...

It has been over three years since Covid-19 cases were first diagnosed in the United States. And while President Joe Biden announced last week that he intends to end the state of national emergency ...

Until the worldwide explosion of the omicron variant, it seemed that showing your vaccination card would be enough to resume many aspects of normal life. Increasingly, however, you also may need to ...

Infectious disease specialist Gonzalo Ballon-Landa, MD, of Scripps Health in San Diego, was a bit bewildered. One of his patients who had all the signs and symptoms of COVID-19 had tested negative ...