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U.S. President Donald Trump (R) and North Korean leader Kim Jong-un (L) during their second summit meeting at the Sofitel Legend Metropole hotel on February 28, 2019 in Hanoi, Vietnam.

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U.S. President Donald Trump speaks at the daily coronavirus briefing at the White House on March 23, 2020 in Washington, DC. (Drew Angerer/Getty Images)

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Tedros Adhanom, Director General of the World Health Organization shakes hands with Chinese President Xi Jinping before a meeting at the Great Hall of the People, on January 28, 2020 in Beijing, China. (Naohiko Hatta/Getty Images)

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Chinese President Xi Jinping at the Huoshenshan Hospital in Wuhan, China on March 10, 2020. (Xinhua/Xie Huanchi via Getty Images)

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Chinese President Xi Jinping, also general secretary of the Communist Party of China Central Committee and chairman of the Central Military Commission, hears a report on the scientific research on COVID-19, March 2, 2020. (Getty Images)