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This file photo taken on February 23, 2017 shows Chinese virologist Shi Zhengli inside the P4 laboratory in Wuhan, capital of China's Hubei province. The World Health Organization said on May 5, 2020 that Washington had provided no evidence to support “speculative” claims by the US president that the new coronavirus originated in a Chinese lab. The facility is among a handful of labs around the world cleared to handle Class 4 pathogens (P4) – dangerous viruses that pose a high risk of person-to-person transmission. (Photo by Johannes Eisele/AFP Photo)
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