How Philadelphia Mandated Vaccinations In 1991
NPR's Sacha Pfeiffer speaks with Dr. Paul Offit, director of the Vaccine Education Center at the Children's Hospital of Philadelphia, about the last time the U.S. mandated measles vaccinations.
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April 14, 2019 at 07:03PM
Health Care
Chủ Nhật, 14 tháng 4, 2019
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