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Experts from the CDC Answer Questions About Vaccines

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From the National Center for Immunization and Respiratory Diseases at CDC, introducing
Medical Officer Andrew T. Kroger, MD, MPH
Nurse Educator Donna L. Weaver, RN, MN
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QUESTION: Our 23-year-old patient has been accepted to a physician assistant program that requires polio vaccine for all students. She has 2 documented doses of oral polio vaccine (OPV) as a child, then recently had a dose of inactivated polio vaccine (IPV). How many more doses of IPV does she need to complete the series and on what schedule?
ANSWER: People who receive a mixed series of OPV and IPV should receive a total of 4 doses. The recent dose of IPV can be counted as the third dose in the primary series. The minimum interval between the third and last doses in the polio vaccination series is 6 months. So the final dose in the series should be given 6 months after the IPV dose.
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