PUBLISHED THU, MAR 11 20219:03 AM EST Berkeley Lovelace Jr.@BERKELEYJR Pfizer said its Covid-19 vaccine blocked 94% of asymptomatic infections in an Israeli study – a result CEO Albert Bourla called “extremely important.” The study also found the vaccine was at least 97% effective against symptomatic Covid cases, hospitalizations and deaths, the company said. Pfizer said...