The great medical threats of life at sea

Apart from scurvy, what have been the most pressing medical problems at sea that navies have brought under control?

Beyond nutritional diseases such as beriberi, navies had to control typhus, typhoid, malaria, yellow fever, tuberculosis, and other infections amplified by crowded crews and tropical service.

The reply first expands the nutritional category beyond scurvy to include beriberi, then sets nutritional deficiencies aside. Typhus and typhoid are identified as different illnesses that could spread rapidly through densely packed groups. Malaria and yellow fever are cited as devastating tropical diseases encountered during overseas service. Tuberculosis adds a slower-moving infectious threat. The exchange names the diseases without describing the measures that brought each under control.