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Studies offer insights into the health risks and burdens faced by people who have had COVID infections. Meanwhile, the Trump administration has narrowed COVID vaccine recommendations and cut research.

New research shows that after the body's defenses kill the virus behind COVID-19, leftover digested chunks of SARS-CoV-2 ...

Since T cells in older adults function differently, scientists could reformulate vaccines to compensate specifically for age-related cellular changes rather than using a one-size-fits-all approach.

Partisan attacks on public health initiatives are undermining efforts to control COVID-19. Claims linking COVID-19 vaccines to pediatric deaths are disputed, citing data on hospitalizations and long ...

Covid vaccines may come with a tantalizing benefit that has nothing to do with the virus they’re designed to protect against: boosting the immune system to better fight tumors during cancer treatment.

Add Yahoo as a preferred source to see more of our stories on Google. With a little help, your immune cells can be potent tumor killers. Steve Gschmeissner/Science Photo Library via Getty Images The ...