Infectious Diseases and Conditions

Infectious diseases are caused by pathogenic microorganisms, such as bacteria, viruses, parasites or fungi; the diseases can be spread, directly or indirectly, from one person to another. Zoonotic diseases are infectious diseases of animals that can cause disease when to transmitted humans (World Health Organization, 2010).

For more information about infectious diseases, visit the WHO website:  http://www.who.int/topics/infectious_diseases/en/