Panama is known because it has ... many freshwater fish. a tropical medicine hospital. a large indigenous population. the largest lake in South America.

a tropical medicine hospital

Explanation:

Panama is located in Central America,having boarders with the Caribbean Sea and the Pacific Ocean. It lies  between Colombia and Costa Rica.

In 1903, the United States took over Panama in order to build a canal there. However, The control of yellow fever, malaria, and other tropical diseases had to be given premium consideration if the completion of the canal in Panama was going to succeed.

U.S. General William Crawford Gorgas, a tropical medicine pioneer eradicated yellow fever  and other tropical diseases from Panama during the construction of the canal.

The tropical medicine hospital in Panama was highly instrumental in the control of tropical diseases in Panama. It was later renamed after U.S. General William Crawford Gorgas, chief sanitary officer of Panama.