The Medical Expedition to Easter Island was sponsored by the World Health Organization and the Canadian Government. Its purpose was to study the relative roles of environment and heredity in the Island's isolated population before an international airport was completed there in 1967. It also carried out pilot studies for the human adaptability section of the International Biological Program. The expedition reached Easter Island on 13 December 1964 and departed on 10 February 1965. For a popular account of the expedition see Helen Evans Reid, 'A World Away: A Canadian Adventure on Easter Island', Toronto, 1965.

The material has been filmed as PMB 532 to 536 inclusive.

Detailed medical records of all Easter Islanders living on the island at the time of the expedition's visit. The records include a photograph of each islander, his/her father's name, mother's name and other vital statistics. A list of the islanders examined, with the serial numbers assigned to them, appears on pp.183-222 of Georges L. Nogrady, ed., Microbiology of Easter Island, vol. 1, Montreal, 1974. The serial numbers are given for each reel of film. On this reel - Serial Numbers 00101 - 04108.