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A man watches posters about COVID-19 in Yaounde, Cameroon, March 6, 2020. Cameroon's Ministry of Public Health confirmed on Friday the country's first and second case of COVID-19. The two patients are now in solitary confinement in Yaounde Central Hospital for treatment. The health authorities are tracing other persons having a higher risk of being contaminated. (Photo by Jean Pierre Kepseu/Xinhua)