epa08075158 A health worker administers polio vaccine to children during a five-day countrywide vaccination campaign in Karachi, Pakistan, 16 December 2019. Pakistan has launched a five-day anti-polio vaccination campaign starting on 16 December as polio workers are due to go door-to-door to administer the vaccine to more than 39 million children under the age of five, according to Pakistan’s polio eradication program. EPA/SHAHZAIB AKBER
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