A new US Senate bill would punish Chinese officials for preventing an investigation into whether the Covid-19 pandemic could be tied to an infectious disease laboratory in Wuhan.
Introduced on Monday by Marco Rubio of Florida and 15 other Republican senators, the bill steps into a debate among scientists, politicians and governments about the hypothesis that, rather than being zoonotic – a natural virus that jumped from animals to humans – Covid-19 somehow escaped from a lab. The furore continues to fuel tensions between China and the US.