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A customer wears a face mask as he shops for seafood at a market in Beijing, Saturday, March 14, 2020. The United States declared a state of emergency Friday as many European countries went on a war footing amid mounting deaths as the world mobilized to fight the widening coronavirus pandemic. For most people, the new coronavirus causes only mild or moderate symptoms, such as fever and cough. For some, especially older adults and people with existing health problems, it can cause more severe illness, including pneumonia. (Photo by Mark Schiefelbein/AP Photo)
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