Pfizer/BioNTech COVID-19 vaccine shows 90.7% efficacy in trial in children

By Michael Erman NEW YORK (Reuters) -The Pfizer/BioNTech COVID-19 vaccine showed 90.7% efficacy against the coronavirus in a clinical trial of children 5 to 11 years old, the U.S. drugmaker said on Friday. Sixteen children in the trial who had received a…