How the U.S solve the problem of yellow fever?

Answer 1

The U.S. addressed yellow fever primarily through the efforts of scientists and public health officials in the early 20th century, notably the work of Walter Reed and his team, who identified the Aedes aegypti mosquito as the disease's vector. This led to effective mosquito control measures, including the elimination of standing water and the use of screens on homes. Additionally, the development of a vaccine in the 1930s further reduced the incidence of yellow fever, leading to successful prevention strategies in endemic areas. These combined efforts significantly decreased the impact of the disease in the U.S. and contributed to global public health initiatives.