This is a featured article. Click here for more information. This can occur over a few hours to a few days. Many but not all oa grey sheet pdf fully recover.
In those with muscle weakness about 2 to 5 percent of children and 15 to 30 percent of adults die. These people are usually back to normal within one or two weeks. Those who are infected may spread the disease for up to six weeks even if no symptoms are present. The disease only occurs naturally in humans. Once infected there is no specific treatment. In 2016, there were 37 cases of wild polio and 5 cases of vaccine-derived polio. This is down from 350,000 wild cases in 1988.
In 2015 Nigeria had stopped the spread of wild poliovirus but it reoccurred in 2016. Poliomyelitis has existed for thousands of years, with depictions of the disease in ancient art. 19th century in Europe and the United States. CNS, which may be paralytic or nonparalytic. The virus enters the central nervous system in about 1 percent of infections. 35 days, with a more common span of six to 20 days.