‘Being truthful is essential’: scientist who stumbled upon Wuhan Covid data speaks out

Florence Debarre's discovery of genetic data online showed for first time that animals susceptible to coronavirus were present at market

• Today in Focus podcast: It's way beyond just science': untangling the hunt for Covid's origins

One of the most compelling clues to the origins of the Covid-19 pandemic was uploaded without announcement to a scientific database, going unnoticed for weeks.

And then, just as suddenly, it vanished from public view.