Some people question the safety of immunizations for children. Although minor discomfort sometimes follows vaccine injections, research does not support claims that immunizations put a child at any significant risk for harmful side effects. The U.S. Centers for Disease Control and Prevention (CDC) vaccine information statements list the side effects of each vaccine.
The risk of a serious complication from a disease is far greater than the risk from the vaccine. For example, 1 child in a group of 20 children may die from diphtheria disease. But only 1 child in a group of 14,000 children may have convulsions or shock after getting the DTaP vaccine. And that child would recover fully.1
Measles is a respiratory disease caused by a virus. It can have life-threatening complications. The CDC calls it the "most deadly of all childhood rash/fever illnesses."
It spreads easily, but the measles-mumps-rubella (MMR) vaccine can prevent it. The CDC recommends that all children, and some adults, get the MMR vaccine.
The U.S. declared measles eliminated from the nation in 2000, but there have been outbreaks since then, and it's still common in other countries.
The U.S. Food and Drug Administration (FDA) carefully evaluates all vaccines for safety. After a vaccine is approved, the FDA, the CDC, the vaccine maker, and several other agencies watch for any reports of rare or unexpected reactions. Federal law requires health professionals to report any reaction following an immunization to the Vaccine Adverse Events Reporting System (VAERS). For more information about how vaccine safety is checked, see www.cdc.gov/vaccinesafety/index.html.
Some people have voiced concern about immunizations when multiple vaccines for different diseases are given at the same time. These people fear that harmful side effects are more likely because the child's immune system is not able to combat all of the vaccine organisms at the same time.