Infectious diseases are also called communicable or transmissible diseases and can be spread from person to person. They are caused by tiny organisms such as viruses, bacteria, parasites, fungi and others.
An infectious disease can be transmitted in a number of ways, including by food, water and air as well as physical contact with a contaminated object or another person. Some diseases are more infectious than others because of the type of organism that causes the infection or because of the way in which the infection is transmitted.
Some people are more susceptible to infection because of underlying diseases such as diabetes or kidney disease or cancer or AIDS. When the body’s natural immunity, or protection against disease, is low, infection is better able to occur.
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UI Hospitals and Clinics is a global resource on a multitude of infectious diseases, ranging from HIV/Aids to influenza, tropical diseases to emerging health threats such as West Nile virus and SARS.
UI Health Care, in a partnership with ADAM Multimedia Encyclopedia, offers you these select topics on Infectious Diseases: