Boston University scientists were today condemned for ‘playing with fire’ after it emerged they had created a lethal new Covid strain in a laboratory. DailyMail.com revealed the team had made a hybrid virus — combining Omicron and the original Wuhan strain — that killed 80 per cent of mice in a study. The revelation exposes how dangerous virus manipulation research continues to go on even in the US, despite fears similar practices may have started the pandemic.