How did the US impact the yellow fever?

The U.S. played a significant role in combating yellow fever, particularly during the late 19th and early 20th centuries. American scientists, notably Walter Reed and his team, identified the Aedes aegypti mosquito as the vector of the disease, leading to effective public health measures such as mosquito control and sanitation improvements. These efforts were crucial during the construction of the Panama Canal, where yellow fever had previously caused high mortality rates among workers. The U.S. response not only helped control outbreaks domestically but also advanced global understanding of the disease and vector control.