Scientists in the Chinese city where Covid emerged planned to alter coronaviruses and release them into bat caves 21 months before the pandemic kicked off, leaked documents have revealed. Dr Peter Daszak, president of New York-based EcoHealth Alliance, proposed working with a group of scientists from the Wuhan Institute of Virology to carry out the research. The experts wanted to genetically enhance coronaviruses and release them among bats in Yunnan — around 1,240miles (2,000km) south west of Wuhan — in the hopes it would stop new viruses jumping from bats to humans.