As people age or become ill, their immune systems can become exhausted and less capable of fighting off viruses such as the flu or COVID-19. In a new mouse study funded in part by the National ...

Cells are dynamic, fast-changing, complex, tiny, and often hard-to-see in environments that don't always behave in predictable ways when exposed to external stimuli. Now, researchers have found new ...

According to new research, T cells have a nuclear receptor doing something very odd—but very important—to help them fight pathogens and destroy cancer cells. This receptor, called retinoic acid ...