The U.S. Centers for Disease Control and Prevention (CDC) today published an updated Level 2 advisory that identified about thirty countries where poliovirus is an active health risk.
Reissued on June 15, 2023, the CDC's Global Polio alert says before traveling to any destination listed, the CDC recommends that adults who previously completed the full, routine polio vaccine series receive a single, lifetime booster dose of polio vaccine.
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