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A lion looks ahead inside its enclosure at the National Zoological Gardens of South Africa in Pretoria on January 19, 2022. Big cats caged in zoos are at risk from catching Covid-19 from their keepers, a study said January 8, 2022 Research led by scientists at the University of Pretoria found three lions and two pumas fell ill with Covid-19 coronavirus, and the clues point to infection by their handlers, some of whom were asymptomatic. (Photo by Phill Magakoe/AFP)
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