Health officials say the best way to keep the United States free of polio is to maintain high levels of immunity through vaccination efforts. WHO Monkeypox Meeting: What Is an Emergency of International Concern?.Polio Vaccine Warning As Virus Resurfaces in U.K.Polio Case Detected in Nearly a Decade: How Virus Transmits The IPV vaccine, which is the only one used in the U.S., provides around 90 percent immunity against all three types of poliovirus after two doses, and at least 99 percent immunity after three doses, according to the Centers for Disease Control and Prevention ( CDC). Is the polio vaccine still required in the U.S.? There are two types of polio vaccine: the oral poliovirus vaccine (OPV) and the inactivated poliovirus vaccine (IPV), although only the latter is still used in the United States. In the United States, the first polio vaccine became available in 1955. Polio vaccines are highly effective at protecting against the disease. The virus is endemic to some parts of the world-polio cases are still detected in Afghanistan and Pakistan, for example. Widespread use of polio vaccines, which began in the 1950s, helped to eradicate polio across most of the world, including the United States, although sporadic cases do still occur in countries even where the disease has technically been wiped out. Polio is a disease caused by the highly infectious poliovirus that can cause paralysis and death in severe cases. While vaccines for polio have existed for years, there is no federal law requiring mandating the vaccine. Polio returned to the headlines this week after the first case of the disease in the United States for nearly a decade was detected in New York.
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