World Health Organization contain the last European outbreak in Yugoslavia in 1972. After over two decades of fighting smallpox, the WHO declared in 1979 that the disease had been eradicated – the first disease in history to be eliminated by human effort. Also in 1967, the WHO launched the Special Programme for Research and Training in Tropical Diseases and the World Health Assembly voted to enact a resolution on Disability Prevention and Rehabilitation, with a focus on community-driven care. In 1974, the Expanded Programme on Immunization and the control programme of onchocerciasis was started, an important partnership between the Food and Agriculture Organization
Countdown to Extinction "Megadeth guns for arena thrash success and gets it on "Countdown to Extinction"". However, Huey noted the simplification of Megadeth's sound on the album in response to Metallica's commercially successful self-titled album released the previous year. Sputnikmusic reviewer Mike Stagno praised Mustaine's vocals as well as a number of the album's tracks. Despite calling this effort "Megadeth's first step into the world of mainstream music", he also noted that "the band still maintains its identity". Reflex described the sound as "impressively clean, streamlined, and sharp, brimming with killing riffs". They highlighted the vocal delivery on the record, saying "Mustaine's never