possibly cancer but there are different types of it
Gingivitis > leading to Periodontal Disease - is the most common disease in the world.Most people don't know they have it.Read more: How_common_is_gingivitis
old age and heart disease
Portal or nutritional cirrhosis is the form of the disease most common in the United States
Lyme disease is a problem worldwide. It is the most common vector-borne disease in Europe and North America.
malaria is a communicable disease caused by mosquito bites. It is most common in Africa, although it is also present in Asia and Latin America.
The most common diseases of aging include Alzheimer's, arthritis, cancer , diabetes, depression , and heart disease .
Rhinovirus, or the "common cold" is the most common disease in U.S. prisons.
Ignorance
the disease is a mirror...
One of the most common diseases of the system is Arthritus.: )
Cancer,AIDS
Common cold