Question: Do Shots Always Work?
Answer: Shots work most of the time, but not always. Most childhood immunizations give immunity to 90-99 percent of the children who get them. But occasionally a child will not respond to certain vaccines. This is another reason why it's important for all children to be vaccinated. A child who has not responded to vaccination has to depend on the immunity of others around her for protection. She could be infected by a child who hasn't been vaccinated, but not by one who is immune.
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