Born in Paris in 1927, Didier Henrioud studied photography and business. In 1947, he became photo editor for the Paris office of the New York Times. In 1948, he moved to Geneva where he joined WHO in 1954. He worked as a photographer and photo editor at WHO until his retirement in 1983. Didier Henrioud died in 2007 in Switzerland.
For 30 years, Mr Henrioud worked at WHO Headquarters in Geneva as well as in the African Regional Office to develop photo coverage of WHO activities. He led the effort to build the network of top freelance photojournalists whose work filled the WHO photo library and contributed to WHO publications. He spent the 1960s and 1970s travelling around the globe photographing WHO programmes. He produced over 70 photo reports and his work often appeared in the World Health magazine.
In 1979, Didier Henrioud travelled to China to photograph the uses of acupuncture for anaesthesia. He visited the Institute of Lung Diseases in Beijing, the Provincial Hospital of Traditional Medicine in Nanjing, and a series of county hospitals. His trip coincided with the Chinese National Symposium on Acupuncture, Moxibustion and Acupuncture Anaesthesia in Beijing, as well as a WHO interregional seminar on the same subject. Mr Henrioud's photographs were published that same year in an article entitled Acupuncture: the WHO view.
Didier Henrioud travelled to the Congo in 1962 to photograph research on venomous snakes at the Institut Pasteur in Brazzaville. The photo report, which appeared in the World Health magazine in 1963, centres specifically on the extraction of venom from Bitis gabonica (Gabon viper) in order to produce anti-snakebite serum.