Most of the time, polio has no symptoms unless the polio virus gets into the blood. It is uncommon for the virus to enter the brain or spinal cord. If this does happen, it can cause muscles to become paralyzed. Some people get better from the paralysis. Others will be disabled. Depending on which muscles have been affected, these people may need a mobility aid or a wheelchair; they may have difficulty using their hands; or they may even have trouble breathing.
About 15 out of every 10000 adults who get polio die. (This means an adult has a 0.015% chance of dying from polio.)
Vaccination with polio vaccines could stop the disease all over the world. Organizations like the World Health Organization have trying to vaccinate as many people as possible against polio. Vaccination has eliminated polio from most countries in the world.
Worldwide, polio has become much less common in the past few decades. In 1988, there were about 350,000 cases of polio in the world. By 2007, the number of cases of polio in the world had decreased by over 99.9%, to just 1,652 cases.
References[change | change source]
- Cohen JI (2004). "Chapter 175: Enteroviruses and Reoviruses". In Kasper DL, Braunwald E, Fauci AS, et al. (eds.). Harrison's Principles of Internal Medicine (16th ed.). McGraw-Hill Professional. p. 1144. ISBN 0071402357.
- Ryan KJ, Ray CG (eds.) (2004). "Enteroviruses". Sherris Medical Microbiology (4th ed.). McGraw Hill. pp. 535–7. ISBN 0-8385-8529-9.
- Heymann D (2006). "Global polio eradication initiative". Bull. World Health Organ. 84 (8): 595. PMID 16917643. http://www.scielosp.org/scielo.php?script=sci_arttext&pid=S0042-96862006000800006&lng=en&nrm=iso&tlng=en.
- Aylward RB (2006). "Eradicating polio: today's challenges and tomorrow's legacy". Annals of Tropical Medicine and Parasitology 100 (5–6): 401–13. doi:10.1179/136485906X97354. PMID 16899145. http://openurl.ingenta.com/content/nlm?genre=article&issn=0003-4983&volume=100&issue=5-6&spage=401&aulast=Aylward. Retrieved 2009-01-02.
- Schonberger L, Kaplan J, Kim-Farley R, Moore M, Eddins D, Hatch M (1984). "Control of paralytic poliomyelitis in the United States". Rev. Infect. Dis. 6 Suppl 2: S424–6. PMID 6740085.
- Centers for Disease Control and Prevention (CDC) (October 2006). "Update on vaccine-derived polioviruses". MMWR Morb. Mortal. Wkly. Rep. 55 (40): 1093–7. PMID 17035927. http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5540a3.htm.
- Kew O, Sutter R, de Gourville E, Dowdle W, Pallansch M (2005). "Vaccine-derived polioviruses and the endgame strategy for global polio eradication". Annu Rev Microbiol 59: 587–635. doi:10.1146/annurev.micro.58.030603.123625. PMID 16153180. http://arjournals.annualreviews.org/doi/abs/10.1146/annurev.micro.58.030603.123625?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub%3dncbi.nlm.nih.gov.
- "Wild Poliovirus Weekly Update". Global Polio Eradication Initiative. 2008-11-25. Archived from the original on 2008-06-16. https://web.archive.org/web/20080616015729/http://www.polioeradication.org/casecount.asp. Retrieved 2008-11-29.