The virus is most often spread by person to person contact with the stool or saliva of the infected person. Two types of vaccines have been developed to prevent the occurrence and spread of the poliomyelitis virus. The first is an inactivated, or killed, form of the virus and the second is an attenuated, or weakened, form of the virus. The development of vaccines has successfully eliminated the disease from the United States. There are continued vaccination efforts in the U.S. to maintain this success rate as this disease still occurs in some areas of the world.
Polioencephalitis
Powassan encephalitis
Viral encephalitis
La Crosse encephalitis
Autoimmune encephalitis
Viliuisk encephalomyelitis
Eastern equine encephalitis
Japanese encephalitis