An auto rickshaw with a poster advertising a polio campaign drives through a market in Peshawar, Pakistan. Pakistan, Afghanistan and Nigeria are the only countries in the world where polio is still endemic. Lack of trust in vaccinations is one of many obstacles that will face public health officials in poor and developing countries as they seek to vaccinate millions of people against COVID-19. (AP Photo/Muhammad Sajjad)


Pakistan launches new anti-polio drive amid tight security


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