Anti-polio gains threatened by returning migrants, 200,000 unvaccinated children in Afghanistan

FILE - A health worker administers a polio vaccine to a child in Peshawar, Pakistan, March 4, 2024.

The World Health Organization said Monday that the recent return of about 600,000 undocumented migrants from Pakistan to Afghanistan and an estimated 200,000 unvaccinated children in southern Afghan regions are a threat to regional gains against polio.