Pfizer, BioNTech say their Covid-19 vaccine is more than 90% effective

Pfizer Inc said on Monday its experimental vaccine was more than 90% effective in preventing COVID-19 based on initial data from a large study, a major victory in the fight against the pandemic. Pfizer and German partner BioNTech SE are the first drugmakers to show successful data from a large-scale clinical trial of a coronavirus vaccine.

Following are reactions to the news. WALID GELLAD, PROFESSOR OF MEDICINE, UNIVERSITY OF PITTSBURGH, UNITED STATES "This is a hint that these mRNA vaccines are likely to work, and there's.

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