In the future, if the disease-causing germs attack the body, the antibodies are ready to fight and destroy them. Your child is protected! How do vaccines work? A weakened form of the germ-virus or bacterium is injected into the body. The body thinks the weak germ is a threat and builds antibodies to fight them. How well do vaccines work? Vaccines work well. Like medicine, not all vaccines are 100% effective. However, most vaccines are highly effective. In fact, after standalone or multiple doses, immunization can offer vaccine-induced immunity about 90 to 100% of the time. For better understanding, consider vaccines as seatbelts. Although they are not 100% effective at protecting you while driving, they significantly reduce the risk of being injured. In rare cases, vaccinated children can still get the disease because they only get partial protection from the vaccine. This is more common in children with an underlying health problem that affects their immune systems. They may develop mild symptoms if exposed to the disease-causing germ but will not suffer from serious complications. 13
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