Health and Medicine

Diseases, Disorders, and Other Health Problems

Which disease is the most common?

The most common noncontagious disease is periodontal disease, such as gingivitis or inflammation of the gums. Few people in their lifetime can avoid the effects of tooth decay. The most common contagious disease in the world is coryza or the common cold. There are nearly 62 million cases of the common cold in the United States annually.


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