Officials with a Chicago zoo say they've vaccinated a million dogs in Tanzania as part of a project to eliminate rabies and save endangered carnivores in the Serengeti National Park.
The Lincoln Park Zoo says its project began in 2003 and the zoo's Serengeti Health Initiative team has worked in villages in northern Tanzania to administer the donated vaccines.
Zoo officials announced their one millionth vaccination in a news release Wednesday.
Steve Thompson is the zoo's vice president of conservation. He says the populations of already-endangered carnivores like lions and African wild dogs were declining as native species were contracting rabies from local domestic dogs.
Zoo officials estimate that the vaccinations have saved about 150 humans from rabies infections as well.