Prefilled syringe with vaccine SPf66, Colombia, 1993
Related Themes and Topics
Parasitic disease transmitted by certain kinds of mosquito. Malaria is characterized by fever and enlargement of the spleen. Each year, there are approximately 515 million cases of malaria, killing between one and three million people.
A substance given to humans or animals to improve immunity from disease. A vaccine can sometimes contain a small amount of bacteria that is designed to stimulate the body's reaction to that particular disease. The first vaccine was developed in 1796 by Edward Jenner to prevent smallpox.