The development of his vaccine production method played a large role in enabling the World Health Organization to initiate its global smallpox eradication campaign in 1967.
Leslie Charteris | Leslie Grantham | Collier's Weekly | Leslie Nielsen | Collier's | Leslie Uggams | Leslie Phillips | Leslie Howard | Leslie West | Leslie Stuart | Leslie Howard (actor) | Leslie | Frank Leslie | Leslie Groves | Leslie Frost | Leslie Cheung | Jeremy Collier | Leslie Marmon Silko | Leslie Fiedler | Leslie Ash | Lisa Leslie | Leslie Stephen | Leslie Caron | Leslie Bibb | Charles Robert Leslie | Leslie Van Gelder | Leslie speaker | Leslie Norris | Leslie Knope | Leslie Halliwell |