The World Health Organization has reported that 18 new cases of Polio have occurred in Xinjiang Province, China. Half of the cases are extremely young children, and the other half are in young adults. This is particularly worrisome because with polio, up to 90% of infected cases will not exhibit symptoms for quite some time. While only 1% will be affected with paralysis, because the disease is transmitted via the fecal-oral route, it is very hard to track epidimiologically.
Travel advisories have been issued for people traveling to this area. Polio vaccinations prior to arriving are highly recommended. Additionally, Guam has been warned because it is popular destination after traveling through Xinjiang. The doctors there are on alert for any possible cases.