This is one of the National Institutes of Health in the U.S. In formal terms, the mission of the NIAID is "to support and conduct research and research training (that) strives to understand, treat, and ultimately prevent the myriad infectious, immunologic, and allergic diseases that threaten millions of human lives." Immunology figures in [..]

Diseases caused by organisms such as bacteria, viruses, fungi or parasites that enter the body. Many organisms live in and on our bodies and they are normally harmless or even helpful. However, under certain conditions, some organisms may cause disease. Some infectious diseases can be passed, directly or indirectly, from person to person.

Infectious Diseases that are novel in their outbreak ranges (geographic and host) or transmission mode.

A disease caused by a virus or parasite which can be transmitted to another host.

Disease caused by the entrance, growth and multiplication of organisms, like viruses, bacteria or parasites.