Pfizer and BioNTech announced that data gathered thus far from its potential coronavirus vaccine indicates that it is more than 90% effective, prompting experts to say while much remains to be seen, there is reason to be ‘cautiously optimistic.’
Pfizer and BioNTech announced that data gathered thus far from its potential coronavirus vaccine indicates that it is more than 90% effective, prompting experts to say while much remains to be seen, there is reason to be ‘cautiously optimistic.’
