More mudslinging by Washington

What does it take for the United States to initiate a new round of mudslinging at China on the origins of the novel coronavirus?

Not much. Merely vague surmises by The Wall Street Journal based on a US intelligence report supposedly citing intelligence gathered by an unspecified "international partner".

Although the Chinese Foreign Ministry immediately denied that three researchers at China's Wuhan Institute of Virology fell ill in November 2019, the report has been jumped on by those trying to cement the idea in people's minds that the lab is the source of the COVID-19 pandemic.