How does the body fight pathogens?
Your body uses white blood cells to fight off the bacteria and viruses that invade your body and make you sick. … The white blood cell is attracted to the bacteria because proteins called antibodies have marked the bacteria for destruction. These antibodies are specific for disease-causing bacteria and viruses.
Are antigens infectious?
Infectious diseases are caused by tiny microorganisms such as bacteria, viruses, fungi, and parasites. Proteins, called antigens, are carried on the cell surface of all infectious organisms; the immune system recognizes these foreign invaders, and in response forms proteins called antibodies to destroy or control them.