Topic: Amesh Adalja

Stem cells derived from a baby's umbilical cord can help save the lives of the sickest COVID-19 patients, results from a small new clinical trial suggest.

Coronaviruses are notorious for prompting a flawed and incomplete immune response in humans, and even those who have been infected by the COVID-19 virus should get vaccinated, infectious disease experts say.

The antidepressant drug fluvoxamine -- best known by the brand name Luvox -- may help prevent serious illness in COVID-19 patients who aren't yet hospitalized, a new study finds.

The results of an early phase 1 trial in 40 adults over the age of 55 suggests that one vaccine, under development by drugmaker Moderna, elicits an immune system response that's equal to that seen in younger recipients.

You're feeling pretty sick -- headache, fever, fatigue, a cough -- but your COVID-19 test came back negative. Well, chances are good that you don't have COVID-19 if that's what the test says, according to experts.

Key differences in immune system function may help determine why severe, life-threatening COVID-19 tends to target older men, scientists say.

Americans are generally well-versed about the use of masks to prevent the spread of COVID-19, although knowledge gaps about face coverings persist, a new HealthDay/Harris Poll reveals.

Researchers say they've uncovered significant differences in how male and female immune systems respond to the new coronavirus.

The COVID-19 coronavirus uses an unusually complex method to replicate itself inside human cells, and experts say the somewhat clunky process could be exploited to stop the virus in its tracks.

When elementary school students get their annual flu shot, everyone benefits, a new study shows.