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We don't know whether a child is more likely to have a reaction to a vaccine if someone else in the family has had one. But the information we do have doesn't indicate that vaccine sensitivity is inherited.
Whether you or your spouse reacted badly to a vaccine as a child isn't a good indicator of whether your child will, because most of today's vaccines are different from the ones you received.
Sibling sensitivity isn't really relevant either, because each child's body chemistry is different. Just as you wouldn't withhold dairy products from one child just because another child is allergic to them, you shouldn't withhold vaccines for one child based on another's response.
True allergic reactions to vaccines are very rare, typically occurring following exposure to egg proteins, gelatin, or latex. These reactions probably occur in fewer than one out of two million children who receive vaccines. Still, it's a good idea for your child to remain in the doctor's office for about 15 minutes after receiving a vaccine, just to be sure.
Children are more likely to have allergies if their parents have allergies, even if not to the same things. So if you or your partner has allergies of any kind, you'll want to keep a close eye on your child after each shot. If you notice anything unusual, tell your child's doctor.
Unfortunately, doctors can't predict which few children will experience adverse reactions to a vaccine. It's important to keep in mind, though, that the overwhelming majority of children in the United States don't have significant side effects from vaccines.