Tiny proteins called nanobodies derived from llama antibodies could lead to safer ways to treat pain, irregular heart rhythms, and seizures.

There was hope that pre-existing immunity to the common cold could protect against COVID, but new evidence suggests that sometimes the opposite can happen.

New research suggests that customizing booster shots based on genes could be a way to make them more effective for more people.

People who exercise for 90 minutes immediately after receiving a flu or COVID-19 vaccine may get an extra immunity boost, researchers report.

Early use of convalescent plasma may help people with COVID-19 avoid having to go to the hospital, a new study shows.

The Omicron variant may be able to escape antibodies offered by a two-vaccine dose, but new findings suggest the booster offers more protection.

Researchers say spike protein mutations could help the Omicron variant of SARS-CoV-2 avoid antibodies produced via COVID-19 vaccination.

At least 1 in 5 hospitalized COVID-19 patients develops autoantibodies, antibodies that attack their own tissue within a week of admission, research finds.

The discovery that COVID-19 vaccination elicits a response in people with weakened immune systems, even if not quite as strong a response, is encouraging news.

Researchers have identified an antibody that is highly protective against a wide range of variants of the virus that causes COVID-19.