It was clear to the organizers of the American effort that previous efforts at disease control had been largely ineffective, as the causes of the two main diseases were unknown, but in 1897 it was proved by Britain's Ronald Ross in India that malaria was treatable.
Previous efforts at disease control had been largely ineffective. The causes of the two main diseases were unknown. This was clear to the organizers of the American effort. Malaria was treatable. It was proved by Britain's Ronald Ross in India this. This was in 1897.