At the same time, however, Zeng, the Chinese CDC official, was advancing just such a hypothesis, not about the Wuhan lab, but Fort Detrick, a US Army biomedical research laboratory in Maryland. There is no evidence to support this theory.
"The US has biological laboratories all over the world," he told a Shanghai-based website, in an interview which linked Fort Detrick, and the US Army Medical Research Institute of Infectious Diseases (USAMRIID) based there, to research carried out by the notorious Unit 731 of the Japanese Imperial Army during World War II.
"Why does the US have so many laboratories? What is the purpose of this?" Zeng said. "In many things, the US requires others to be open and transparent. In the end, it turns out that the US itself is often the most opaque."