Yellow fever now states that a single dose of vaccination is sufficient to confer lifelong immunity against yellow fever disease." The attenuated live vaccine stem 17D was developed in 1937 by Max Theiler. The World Health Organization (WHO) recommends routine vaccinations for people living in affected areas between the 9th and 12th month after birth. Up to one in four people experience fever, aches, and local soreness and redness at the site of injection. In rare cases (less than one in 200,000 to 300,000), the vaccination can cause yellow fever vaccine-associated viscerotropic disease, which is fatal in 60% of cases. It is
Arnold Theiler and had two sons and two daughters, the younger two of whom worked at Onderstepoort: Hans (1894–1947), a veterinarian; Margaret (1896–1988), a teacher; Gertrud (1897–1986), a parasitologist and professor; and Max Theiler (1899–1972), a Nobel laureate in 1951 in Physiology and Medicine. Arnold Theiler Sir Arnold Theiler KCMG (26 March 1867 – 24 July 1936) Pour le Mérite is considered to be the father of veterinary science in South Africa. He was born in Frick, Canton Aargau, Switzerland. He received his higher education, and later qualified as a veterinarian, in Zurich. In 1891 Theiler travelled to South Africa and at