German biotech firm BioNTech and US drugmaker Pfizer on Monday reported additional data from their experimental Covid-19 vaccine that showed it was safe and induced an immune response in patients.
BioNtech's US shares gained 12 per cent, while Pfizer's stock rose 3.
6 per cent in early trading.
The companies said the data also demonstrated an induction of high level of T-cell responses against the novel coronavirus.
More than 150 possible vaccines are being developed and tested around the world to try to stop.....