'There is a cure': California biotech company claims it's discovered an antibody that can block '100%' of coronavirus infections    Sorrento Therapeutics of California is set to announce that it has discovered an antibody that can completely block coronavirus  Scientists with the company are calling it a 'cure' and say the antibody could be used to make a treatment months before a vaccine is available  Up to 200,000 doses could be made a month while Sorrento awa