He likened the vaccine project, dubbed 'Operation Warp Speed', to the World War Two effort to produce the world's first nuclear weapons.
US President Donald Trump says the US will reopen, "vaccine or no vaccine", as he announced an objective to deliver a coronavirus vaccine by year end.
He likened the vaccine project, dubbed "Operation Warp Speed", to the World War Two effort to produce the world's first nuclear weapons.
But Trump made clear that even without a vaccine, Americans must begin to return to their lives as normal, the BBC reported on Saturday.