How safe are vaccines? You may wonder if vaccines can harm your child. Probably not. Any medicine can cause a reaction. Even aspirin and vaccines are no exception. Most children won’t have any reaction to a given vaccine, but for those who do, most reactions are minor—a sore leg, a slight rash, or a mild fever that goes away within a day or two. Some children may develop moderate reactions such as high fever, chills, or muscle aches. A few of the serious reactions are febrile seizures or fits and severe allergic reactions. These worrying possibilities may make some parents think that it might be better not to vaccinate their children. However, these reactions are rare and affect one in a million children. Evena life-threateningallergic reaction can be brought under control by a doctor in the hospital. In addition, we have weighed the benefits of vaccines over their rare and severe side effects. Further, immunization protects children against specific and serious diseases, which would otherwise cause stress and worry about whether a child becomes severely ill or possibly die from a condition that a vaccine could prevent. 14
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