The controller is priced at $50 USD, and will release alongside Valve's Steam Link service, which is also slated for a $50 release. The controller's worldwide pricing will be announced closer to November, Valve said. Hands-on With the Updated Valve Controller. 01:37.
Polio rose to epidemic proportions in the United States with more than 21,000 cases reported in 1952 [3]. With the development of effective vaccines against the virus during the 1950s the incidence of poliomyelitis went in decline and the last case of wild-type virus reported in the United States was in 1979.
Eradication is within reach. Thanks to UNICEF and partners' global immunization and vaccine efforts, polio has almostâbut not quiteâdisappeared. In 1988 there were 350,000 cases; in 2012, only 223. In 2014, India joined the ranks of the polio-free, a major achievement thanks to lifesaving polio vaccines. And in 2016 â throughout the entire world â there were only 37 cases.