Three Countries Confirm New Polio Cases

According to the latest weekly update from the Global Polio Eradication Initiative (GPEI), three countries have reported new cases of polio.

As of September 15, 2025, the GPEI confirmed that Chad, Nigeria, and Somalia reported vaccine-derived poliovirus types.

In the Federal Republic of Nigeria, four cVDPV2 cases were reported this week, two from Sokoto, and one each from Zamfara and Kaduna. 

The total number of cases reported in Nigeria this year is 28. The number of cases from 2024 remains 98.

To alert international travelers of this serious health risk, the U.S. CDC published a Level 2 - Practice Enhanced Precautions, Travel Health Advisory in August 2025. In total, the CDC identified 39 countries where poliovirus has been identified.

The CDC advises that before traveling to any destination listed below, adults who previously completed the whole, routine polio vaccine (IPV) series may receive a single, lifetime booster dose of polio vaccine.

Polio vaccination services are offered at travel clinics and pharmacies in the USA.