A Chinese scientist is still conducting "potentially catastrophic" research into coronaviruses five years on from the start of the Covid pandemic which claimed millions of lives worldwide, according to experts.

Shi Zhengli, 60, is one of the world's leading scientists working on bat coronaviruses in Wuhan. She has reportedly earned herself the nickname "Batwoman" as a result. She was thrown into the spotlight in late 2019 when a new form of coronavirus emerged in the region, with some scientists questioning whether Covid-19 leaked from a lab.