COVID-19 vaccine developers Pfizer (NYSE:PFE) and its partner BioNTech (Nasdaq:BNTX) have won emergency use authorization (EUA) for a single booster dose of their omicron BA.4/BA.5-adapted bivalent COVID-19 booster for kids between 6 months and 4 years of age. The booster can be administered at least two months after completing the primary vaccination series with three…