How one doctor let infected mosquitoes kill him to save humanity from an outbreak

In 1900, Dr Jesse Lazear died after being bitten by a mosquito carrying yellow fever, helping prove the disease was mosquito-borne. His sacrifice confirmed Carlos Finlay’s contested theory, overturned flawed assumptions, and enabled sweeping public health reforms. The discovery transformed tropical medicine, made projects like the Panama Canal possible, and reshaped humanity’s fight against epidemic disease.