Almroth Edward Wright (1861-1947) was an English bacteriologist and immunologist. In 1902 Wright started a research department at St Mary's Hospital Medical School in London. He developed a system of anti-typhoid fever inoculation and a method of measuring protective substances (opsonin) in human blood. He convinced the armed forces that 10 million vaccines for the troops in northern France should be produced during World War I. Wright warned early on that antibiotics would create resistant bacteria, something that has proven an increasing danger. He made his thoughts on preventive medicine influential, stressing preventive measures. He was elected a Fellow of the Royal Society in1906. He died in 1947 at the age of 85.