The World Health Organization (WHO) said on Tuesday it has approved a Covid-19 vaccine made by drugmaker Sinovac Biotech for emergency use listing, paving the way for a second Chinese shot to be used in poor countries.

A WHO emergency listing is a signal to national regulators on a product's safety and efficacy. It will also allow the shot to be included in Covax, the global programme to provide vaccines mainly for poor countries, which face major supply problems due to an Indian export suspension...