(ANSA) - ROMA, 23 MAG - epa09968885 A health worker
administers polio vaccine to a child during a polio vaccination
door-to-door campaign in Quetta, Pakistan, 23 May 2022. Repeated
immunizations have protected millions of children from polio,
allowing almost all countries in the world to become polio-free,
besides the two endemic countries of Pakistan and Afghanistan
EPA/SHAHZAIB AKBER
SHAHZAIB AKBER/ (ANSA).