Yellow fever built federal public health in America. The 1793 Philadelphia catastrophe emptied the capital, the 1878 Mississippi Valley epidemic produced the National Quarantine Act, and an Army commission in Cuba proved the mosquito theory, with William Gorgas's mosquito war following. The cure was an Army and Cuba triumph, but the quarantine machinery the epidemics forced into being became the federal service's lasting power.
Death tolls for the 1878 epidemic range from about 16,000 to 20,000. Credit for the mosquito discovery is shared between Finlay's hypothesis and the Reed commission's proof, and eradication was an Army and Cuban achievement, not the Public Health Service's.



