More than 700 people sought the free services of the doctors and medical staff on the first day, Monday.
The health service provided by more than 50 doctors will include dental care and out-patient treatment.
Cambodia currently spends around $50 million per year for its HIV and AIDS programs, with about 90 percent funded by donors.
Calmette hospital is home to many of the most seriously injured.
To prevent IBS, the doctor says to stay away from dairy products, cabbage, radishes and onions.
Frieden also called for wider implementation of a World Health Organization policy package.
One in five Americans has irritable bowel syndrome.
In Cambodia, only a third of all chemicals in local markets are registered with the Ministry of Agriculture.
Those snails form a part of the life cycle of schistosomiasis, which can have harmful effects on people.
In child mortality, which was a prime concern in the past, Cambodia has made “remarkable progress” since 2000.