10 Health Conditions That are More Common Than You Think

An Afghan woman and her grandson sit outside their house after a return from a reguee camp. Each year, more than 250,000 Afghans are affected with leishmaniasis, one of the 10 diseases on our list. See staying healthy pictures for preventive care.
Paula Bronstein/Getty Images News/Getty Images

Public health advocates work to spread education about the threat of HIV. Advocacy groups raise awareness about leukemia and breast cancer. And healthcare workers worldwide work with major media providers to alert us to the pandemic potential of the H1N1 flu virus.

But there's a lot more out there that can affect our health.

The world is filled with diseases and health conditions that, although not front-page news, affect millions of people. Some target poor or underdeveloped parts of the world. Others are common in the U.S., but since they're not life-threatening don't receive the same amount of attention as HIV (which affects 33 million people worldwide and kills about 2 million each year) or breast cancer (where 1.3 million are diagnosed annually worldwide and about 41,000 die each year)[sources: UNAIDS, Imaginis]. The World Health Organization's (WHO) Neglected Tropical Diseases (NTD) program works to raise awareness of -- and promote treatment for -- the most destructive of these diseases.

Unexpected health conditions can strike anywhere. Here are 10 health conditions that are far more prevalent than you may have realized. Can you guess what they are?