Researchers identify genetic mutation in small group of people who developed the serious disorder after receiving the AstraZeneca or Johnson & Johnson vaccine.

A rare but serious clotting disorder linked to certain COVID-19 vaccines and natural adenovirus infections has puzzled scientists for years.

In an experimental trial, a personalized mRNA vaccine was tested in 14 individuals with an aggressive form of breast cancer. It trained immune cells to target cancer-specific mutant proteins, inducing ...