(FILES) This file photo taken on February 23, 2017 shows workers next to a cage with mice (R) inside the P4 laboratory in Wuhan, the capital of China's Hubei province. - The Chinese biosafety laboratory accused by top US officials of being at the origin of the coronavirus pandemic studies the world's most dangerous diseases, with researchers who investigate viruses that live in bats. (Photo by Johannes EISELE / AFP) / TO GO WITH Health-virus-China-lab,Q&A by Beiyi Seow