Two of the key figures in the story of Covid’s origins gave away vital new information last week before the US Congress.

One of these figures is Ralph Baric, the University of North Carolina professor who invented ingenious techniques for genetically altering coronaviruses. He effectively taught scientists at the Wuhan Institute of Virology in China how to do ‘gain of function’ experiments with bat-derived sarbecoviruses to make them more infectious or lethal in humanised mice. The other figure is Peter Daszak, the highly paid president of the non-profit, EcoHealth Alliance. Over many years, EcoHealth Alliance has channelled large sums of US taxpayer money to the Wuhan Institute of Virology for ‘gain of function’ experimentation, and for finding new sarbecoviruses in bats.

Up until now, Baric and Daszak have taken slightly different approaches to (hardly) helping the world understand what went on in Wuhan before the Covid-19 outbreak in November 2019. Baric has remained largely silent, refusing to do interviews or sign up to articles in the scientific press. He remained silent last week, too, but the Congressional Select Subcommittee on the Coronavirus Pandemic released the transcript of a lengthy closed-door session it held with him in January.