This aerial view shows the P4 laboratory (C) on the campus of the Wuhan Institute of Virology in Wuhan in China's central Hubei province on May 13, 2020. - Opened in 2018, the P4 lab, which is part of the greater Wuhan Institute of Virology and conducts research on the world's most dangerous diseases, has been accused by top US officials of being the source of the COVID-19 coronavirus pandemic. (Photo by Hector RETAMAL / AFP)