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A child's finger is marked after receiving a polio vaccine in northwest Pakistan's Peshawar, on Jan. 12, 2021. A five-day national polio immunization drive began on Monday to vaccinate over 40 million children under the age of five across Pakistan. Around 285,000 polio frontline workers equipped with personal protective gear will go door to door to vaccinate children during the vaccination drive, according to the Pakistan Polio Eradication Program. (Photo by Saeed Ahmad/Xinhua)
