Some cells do repairs if you get a cut. Red blood cells deliver oxygen and take away rubbish. And your white blood cells are like police looking for germs. There's a lot going on inside you!

Imagine bacteria adhering to the surface of a cell, perhaps at the site of an injury or wound. In response, a white blood cell arrives at the scene. This cell encircles the pathogen with its membrane, ...

This increase in white blood cells, deployed from the animals' bone marrow, occurred shortly after exposure to A485. About 12 hours later, the researchers said, cell counts dropped back to ...