Miracle in Tonga (USPHS, 1965)
This film tells the story of a group of doctors who went to the South Pacific islands of Tonga to immunize people against smallpox, using an experimental vaccination device. The narrator, one of the doctors, gives a brief history of Tonga, explaining that the small population is peaceful, isolated, and has no history of smallpox. He then explains the new jet injection gun, operated by foot pedal, which is much cheaper and more efficient than standard vaccination methods.