The US government has approved the development of a deadly bird flu bioweapon which could infect millions of humans worldwide.

Research labs have been given the go-ahead to experiment with the deadly virus in order “protect human health.”

Dailymail.co.uk reports: But Professor Steven Salzberg, a biomedical engineering expert at Johns Hopkins University in Maryland, said he cannot fathom why the US National Institutes of Health, which has permitted the ‘dangerous’ research, is allowing it to happen.

‘I’ve said it before, more than once,’ he wrote in a column for Forbes magazine.

‘Engineering the flu to be more virulent is a terrible idea… This research has the potential to cause millions of deaths.’

Professor Salzberg claimed two scientists have spent years trying to mutate the avian flu to spread between humans.

But the National Institutes of Health (NIH), the US Government’s medical research agency, put the research on hold in 2014 because…