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Immunizations - Poliomyelitis

Description

An in-depth report on the purpose of immunizations and recommended schedules.

Alternative Names

Measles; Rubella; Tetanus; Vaccinations; Whooping cough

Poliomyelitis:

Poliomyelitis, more commonly known as polio, is a disorder caused by a virus and marked by potentially paralyzing nerve-related damage, which can be fatal. Fifty years ago it was a major killer of children, and it remains a threat in parts of Asia and Africa today. Vaccination programs eliminated the disease in the Americas in 1994, with the last case of wild poliovirus in the U.S. reported in 1979. As of 2004, polio has been eradicated in the Americas, the Western Pacific, and Europe.

Poliomyelitis is a communicable disease caused by viral infection and occurs through direct contact with infected secretions. Polio is found worldwide, but immunization has reduced the incidence. Clinical polio affects the central nervous system (brain and spinal cord). Disability is more common than death.

Vaccines for Poliovirus

Two poliovirus vaccines have been available in the U.S.: oral poliovirus vaccine (OPV), a live-virus vaccine, and inactivated poliovirus vaccine (IPV), a killed vaccine that is administered by a shot. Both produce immunity in more than 95% of people. The live-virus used in the vaccine, however, has, in some cases, reverted to a form that can cause polio in unvaccinated people. This is a particular danger in developing countries where vaccination rates are low. The Centers for Disease Control and Prevention now recommends only the inactivated IPV vaccine for children. The schedule is 4 doses of IPV at ages 2 months, 4 months, 6 - 18 months, and 4 - 6 years.

Poliovirus Vaccine in Older Children and Adults. The poliovirus vaccine is not usually recommended for people over 18. Exceptions are unvaccinated health care workers, laboratory technicians, or others exposed to polioviruses. Travelers to developing countries where outbreaks of poliovirus have been reported should be vaccinated. Adults who need protection should also be given the inactivated poliovirus vaccine (IPV).

Side Effects of the Poliomyelitis Vaccines

Allergic Reactions. The inactivated poliovirus vaccine (IPV) contains small amounts of streptomycin and neomycin, so people allergic to these antibiotics can also have an allergic response to this vaccine. Patients should report any allergies to their physician.

Paralysis. Rare cases of paralysis have occurred in people taking the oral live poliovirus vaccine or in those exposed to recipients of this vaccine. It should be stressed the risk is very small, with only 1 case occurring out of 2.4 million doses. Since the introduction of the current recommended series that uses only IPV, no cases have been reported.

Contamination by Simian Virus 40. The public was alarmed by reports of contamination of polio vaccines given between 1955 and 1963 by a virus known as SV40. The virus has been detected in certain rare cancers, including mesothelioma (a lung cancer normally associated with asbestos exposure), osteosarcoma, some brain tumors, and non-Hodgkin's lymphoma.

Still, about 98 million people may have been exposed, and most of these cancers are very rare (although some, including non-Hodgkin's lymphoma, are increasing). At least 40 years of observation have raised no red flags that indicate any serious problem. However, polio, once a major killer of children, has nearly been wiped out worldwide.

Resources

www.immunize.org -- Immunization Action Coalition
www.cdc.gov/vaccines/ -- The National Immunization Program
www.fda.gov/cber/vaers/vaers.htm -- Vaccine Adverse Event Reporting System
www.hrsa.gov/vaccinecompensation/ -- National Vaccine Injury Compensation Program
www.immunizationinfo.org -- The National Network for Immunization Information
www.vaccine.chop.edu -- Vaccine Education Center, Children's Hospital of Philadelphia
www.vaccinesafety.edu -- Institute for Vaccine Safety, Johns Hopkins School of Public Health
www.whathealth.com -- National Partnership for Immunization
www.immunofacts.com -- Information on vaccinations
www.vaccines.org -- The Vaccine Page

References

American Academy of Pediatrics Committee on Infectious Diseases. Prevention and control of meningococcal disease: recommendations for use of meningococcal vaccines in pediatric patients. Pediatrics. 2005 Aug;116(2):496-505.

Centers for Disease Control and Prevention. Recommended Immunization Schedule for Ages 0 - 6 Years, United States, 2009.

Centers for Disease Control and Prevention. Recommended Immunization Schedule for Ages 7 - 18 Years, United States, 2009.

Centers for Disease Control and Prevention. Recommended Immunization Schedule for Adults, United States, 2009. Available online.

Centers for Disease Control and Prevention. Revised Recommendations of the Advisory Committee on Immunization Practices to Vaccinate All Persons Aged 11 - 18 Years with Meningococcal Conjugate Vaccine. Morbidity and Mortality Weekly Report. 2007:56(31);794-795.

Centers for Disease Control and Prevention. Notice to Readers: Recommendation from the Advisory Committee on Immunization Practices (ACIP) for Use of Quadrivalent Meningococcal Conjugate Vaccine (MCV4) in Children Aged 2 - 10 Years at Increased Risk for Invasive Meningococcal Disease. Morbidity and Mortality Weekly Report. 2007;56(48);1265-1266.

Centers for Disease Control and Prevention. Prevention of influenza: Recommendations of the Advisory Committee on Immunization Practices (ACIP), 2008. Morbidity and Mortality Weekly Report. 2008:57(No. RR-7).

Centers for Disease Control and Prevention. Update on Hib Vaccine Shortage. October 22, 2008. Available online.

Chaves SS, Gargiullo P, Zhang JX, Civen R, Guris D, Mascola L. Loss of vaccine-induced immunity to varicella over time. NEJM. March 15, 2007;356:1121-1129.

Garland SM, Hernandez-Avila M, Wheeler CM, Perez G, Harper DM, Leodolter S, et al. Quadrivalent vaccine against human papillomavirus to prevent anogenital diseases. NEJM. May 10, 2007;356:1928-1943.

GlaxoSmithKline. Boostrix Prescribing Information. December, 2008.

Grijalva CG, Nuorti JP, Arbogast PG, Martin SW, Edwards KM, Griffin MR. Decline in pneumonia admissions after routine childhood immunisation with pneumococcal conjugate vaccine in the USA: a time-series analysis. Lancet. April 7, 2007;369:1179-1186.

Poehling KA, Szilagyi PG, Crijalva CG, Martin SW, LaFleur B, Mitchel E, et al. Reduction of frequent otitis media and pressure-equalizing tube insertions in children after introduction of pneumococcal conjugate vaccine. Pediatrics. April 4, 2007;119:707-715.

US Food and Drug Administration. FDA Approves Expanded Uses for Gardasil to Include Preventing Certain Vulvar and Vaginal Cancers. September 12, 2008.

US Food and Drug Administration. FDA Approves New Vaccine to Prevent Gastroenteritis Caused by Rotavirus. April 3, 2008.

US Food and Drug Administration. Zostavax Questions and Answers. Available online. Last Accessed 3/12/2009.

World Health Organization. Immunization surveillance, assessment and monitoring -- United States of America (the) reported cases. Last Updated: December 18, 2008. Available online.

Zuckerman JN. Protective efficacy, immunotherapeutic potential, and safety of hepatitis B vaccines. J Med Virol. 2006 Feb;78(2):169-77.

Reviewed last on: 3/23/2009
Harvey Simon, MD, Editor-in-Chief, Associate Professor of Medicine, Harvard Medical School; Physician, Massachusetts General Hospital. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

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