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Children's Vaccines Health Center

Vaccines: A Safe Choice

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Vaccines are safe.

Vaccines are held to the highest standard of safety. The United States currently has the safest, most effective vaccine supply in history. Years of testing are required by law before a vaccine can be licensed. Once in use, vaccines are continually monitored for safety and efficacy.

Each person is unique and may react differently to immunization.

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  • Occasionally, people who receive a vaccine do not respond to it and may still get the illness the vaccine was meant to protect them against.
  • In most cases, vaccines are effective and cause no side effects, or only mild reactions such as fever or soreness at the injection site.
  • Very rarely, people experience more serious side effects, like allergic reactions. Be sure to tell your health care provider if you have health problems or known allergies to medications or food.
  • Severe reactions to vaccines occur so rarely that the risk is difficult to calculate.

The Centers for Disease Control and Prevention (CDC) and the Food and Drug Administration (FDA) continually work to make already safe vaccines even safer. In the rare event that a child is injured by a vaccine, he or she may be compensated through the National Vaccine Injury Compensation Program (VICP). For more information about VICP visit http://www.hrsa.gov/osp/vicp/ or call 1-800-338-2382.

Not vaccinating your child? Be aware of the risks.

Immunizations, like any medication, can cause side effects. However, a decision not to immunize a child also involves risk. It is a decision to put the child and others who come into contact with him or her at risk of contracting a disease that could be dangerous or deadly. Consider measles. One out of 30 children with measles gets pneumonia. For every 1,000 children who get the disease, one or two will die from it. Thanks to vaccines, we have few cases of measles in the U.S. today. However, the disease is extremely contagious and each year dozens of cases are imported from abroad into the U.S., threatening the health of people who have not been vaccinated and those for whom the vaccine was not effective. Unvaccinated children are also at risk from meningitis (swelling of the lining of the brain) caused by Hib (a severe bacterial infection), bloodstream infections caused by pneumococcus, deafness caused by mumps, and liver cancer caused by hepatitis B virus.

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