The early weeks of pregnancy are fragile—and confusing. Here, the answers to your questions.
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"Live-virus vaccines like varicella [chickenpox] or MMR [measles, mumps, rubella] aren't recommended during pregnancy," says Charles "Skip" Wolfe of the U.S. Centers for Disease Control and Prevention's National Center for Immunizations and Respiratory Diseases. If you discover you're pregnant after receiving a live-virus vaccine, contact the Varicella Vaccine in Pregnancy Registry at 800-986-8999. (The CDC wishes to track such women, because there is a theoretical risk your baby could be born with congenital vari