Scientists discover why some with Covid are asymptomatic

Covid cases are on the rise again overseas with a new variant emerging. EG.5.1 nicknamed Eris is now accounting for almost 20 per cent of new cases across the UK and the United States. Meanwhile, scientists have discovered the gene believed to be responsible for the 20 percent of people who've had Covid but not experienced symptoms! Professor Stephanie Gras from Australia's La Trobe University co-authored the study. She explains their discovery.