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Train commuters hold on to the side of an overcrowded passenger train in Soweto, South Africa, Monday, March 16, 2020. South Africa will revoke nearly 10,000 visas issued this year to people from China and Iran, and visas will now be required for other high-risk countries that had been visa-free, including Italy and the United States. For most people, the new coronavirus causes only mild or moderate symptoms. For some it can cause more severe illness, especially in older adults and people with existing health problems. (Photo by Themba Hadebe/AP Photo)
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