Meningitis

A bodily response in which white blood cells and other immune cell protect your body from disease or injury.

Tiny organisms that may cause certain infections.

A lack of concentration or alertness as well as a sense of lethargy and loss of motivation; involves the central nervous system.

A micro-organism which invades living cells in order to grow or reproduce. Viruses cause many infections, from the common cold, chickenpox and measles to HIV.