With the recent news that people who've gotten two doses of the COVID-19 vaccine will be able to get a booster shot, an expert explains what to know.

As Delta variant cases are on the rise, a new poll shows how Americans feel about COVID-19 vaccine mandates for some events and certain workers.

An on again-off again approach to masks is probably here to stay, but basic risk assessment skills can help weigh the pros and cons of changing conditions.

"...delta is surging, yes, but there's no evidence that it is better at overcoming vaccine-induced immunity compared to other variants."

A new study of 17,000 pregnant people who got the COVID-19 vaccine shows they had no worse symptoms than non-pregnant people.

"It is tragic that the exact vaccines that might help prevent EED don't work in children who have the disease," says Timothy Hand.

Experts explain the COVID-19 vaccine rollout, what's going wrong (particularly in low-income countries), and what needs to change.

Children who had mild COVID-19 still have robust antibody responses up to four months later. In some case those responses are superior to that of adults.

With no COVID vaccine available for kids younger than 12, an expert explains how trials work and when we can expect kids to be able to get the shot.

New research that digs into the effects of the second COVID vaccine shot one on the body’s immune system shows why people definitely should not skip it.