Pfizer (NYSE:PFE) and BioNTech SE (Nasdaq:BNTX) have shared positive data from a Phase 2/3 clinical study testing a third 10-µg dose of the Pfizer-BioNTech COVID-19 vaccine in healthy children aged 5 through 11. The most recent data show that a booster dose of the BNT162b2 vaccine led to increased neutralizing titers for the omicron variant…