Covid lab leak theory should not be ruled out, top Chinese scientist says

Virologist George Gao also states for first time that China has investigated claim virus came from a laboratory

The former director of China's Center for Disease Control and Protection (CDC) has said the lab leak theory for the origins of Covid-19 should not be discounted.

George Gao, an internationally respected virologist, also said another branch of the Chinese government had investigated the lab leak theory - the first such acknowledgment that some kind of official investigation took place. They haven't found wrongdoing," he said.