Polio is an ancient scourge that became vaccine-preventable in the 1950's.Transmission of wild poliovirus was interrupted in the United States in 1979, or possibly earlier. A polio eradication program conducted by the Pan American Health Organization led to elimination of polio in the Western Hemisphere in 1991. The Global Polio Eradication Program has dramatically reduced poliovirus transmission throughout the world. A total of 222 polio cases were reported in 2012 from five countries, the bulk of which (97% or 216 of the 222 cases) were from the three remaining endemic countries: Afghanistan, Nigeria and Pakistan.
When symptomatic, polio causes paralysis of the muscles. Most people never completely recover. Luckily, however, up to 95% of all polio infections occur without symptoms. Infected persons without symptoms shed viruses in the stool, and are thus able to spread the virus to others. Childhood immunization
Health care providers and clinical laboratories are required by law to report cases and suspect cases
of polio to local health departments immediately, day or night,
after identification. Call 971-673-1111
to reach the state health department doctor on call.
See our disease reporting page
for information on how to report and for telephone numbers of local health departments. For county health departments
For reportable diseases lacking Oregon-specific investigative guidelines or case report forms, please contact the epidemiologist on call for assistance.
Polio (vaccine-preventable) search results