A standard preparation of one type or a combination of the three types of live, attenuated polioviruses. In 1999, an advisory panel to the Centers for Disease Control and Prevention recommended that live oral poliovirus no longer be used routinely because it has caused 8 to 10 cases of polio each year. This risk is no longer acceptable now that the polio epidemic has been eliminated in the U.S.
A vaccine prepared from three types of live attenuated polioviruses. In 1999, an advisory panel to the Centers for Disease Control and Prevention recommended that its routine use be discontinued. Because it contains a live, although weakened virus, it has caused 8 to 10 cases of polio each year. This risk is no longer acceptable now that the polio epidemic has been eliminated in the U.S.