"Pfizer Inc. and BioNTech SE’s Covid-19 vaccine was overwhelmingly effective against the virus in a study that followed nearly 1.2 million people in Israel, results that public-health experts said show that immunizations could end the pandemic."

"Two doses of the vaccine prevented 94% of Covid-19 cases in 596,618 people vaccinated between Dec. 20 and Feb. 1, about one-quarter of whom were over the age of 60, teams from the Clalit Research Institute and Harvard University reported in a study published Wednesday in the New England Journal of Medicine."

Bold statement to be sure. Possibility of ending this pandemic rests as much on vaccine delivery as efficacy, maybe more. Deployment, access, transparency in communication are the real keys to success here.