IPOL

Polio vaccines are vaccines used to prevent poliomyelitis (polio).[2] Two types are used: an inactivated poliovirus given by injection (IPV) and a weakened poliovirus given by mouth (OPV).[2] The World Health Organization (WHO) recommends all children be fully vaccinated against polio.[2] The two vaccines have eliminated polio from most of the world,[3][4] and reduced the number of cases reported each year from an... [wikipedia]