Pfizer and BioNTech face challenges following announcement about Covid-19 vaccine effectiveness
Germany-based biotech firm, Pfizer and BioNTech, announced that their Covid-19 vaccine showed more than 90% effective, fueling hope for successful preventing infection to human. However, it seems to have to conquer many challenges before there is widespread vaccination.
14:39 | 11/11/2020
Prev Next
