Some sick cell of psychotic suicide bombers had just attacked my world.

But scientists have been unsure exactly what in the cartilage and joints the immune cells are attacking.

Autoimmune diseases are caused when such cells mistakenly attack the body's own tissues.

During his absence, the Phyrexian cell finally broke through the time-bubble and attacked the Academy.

White cells proliferated out of the bone marrow and flooded the system, attacking healthy systems.

- For instance, I could change the ship's pattern to that of an E coli bacterium and the white cell would attack at once.

The cells immediately attacked his organs.

"The cells generally do not not attack inside the country they inhabit," the Western intelligence document says.

That is, the immune cells attack the proteins in other parts of the body as well.

White-blood cells attack the crystals, producing swelling and inflammation.