Delta spreads 'like wildfire' as doctors study whether it makes patients sicker

With a new wave of COVID-19 infections fueled by the Delta variant striking countries worldwide, disease experts are scrambling to learn whether the latest version of coronavirus is making people - mainly the unvaccinated - sicker than before. The U.S. Centers for Disease Control and Prevention warned that Delta, first identified in India and now dominant worldwide, is 'likely more severe' than earlier versions of the virus, according to an internal report made public on Friday.