Giving vaccine priority to older adults and others most at risk of dying will actually save the maximum number of lives and the most years of life.

"This proportion is quite surprising. It's crucial that everyone—including individuals who don't show symptoms—adhere to public health guidelines..."

A new diagnostic tool that plugs into a phone can test for COVID-19 in 55 minutes or less, researchers report. It can be done almost anywhere, too.

In several countries, including the US, the number of people who say they'll get a COVID-19 vaccine is falling short of the number needed for herd immunity.

An expert breaks down what we know about the new coronavirus strains and why you should be wearing two masks during the pandemic.

A certain type of asthma may make people more susceptible to flu and also lead to dangerous flu mutations, according to new studies in animals.

New research offers assurance that those receiving cancer treatment are safe when receiving care in oncology and hematology settings.

Breastfeeding women with COVID-19 don't transmit the SARS-CoV-2 virus through their milk, researchers report. They do pass on antibodies, though.

New research adds to growing evidence that dogs can detect COVID-19 infection by smell. Can our four-legged friends help fight the pandemic?

Three things—obesity, age, and COVID-19 infection—may flag you as a "super-spreader," someone who can transmit the virus with devastating consequences.