What are diseases?

A disease is an illness that affects the body (a single area or the whole system) and/or mind within a single organism (World Health Organization). Basically when a person is in a diseased state, they are no longer classified by modern and traditional medical diagnosis as “healthy”. Some examples of common diseases worldwide are: Influenza A virus, Asthma, HIV/AIDS, HPV, Malaria, and Sickle Cell Anemia. In addition, diseases are generally classified into three categories, which include: Genetic, infectious, and non-infectious.