FDA approves Merck vaccine designed to protect adults from bacteria that can cause pneumonia, serious infections CNBCFDA signs off on Merck’s pneumococcal vax for adults, Capvaxive FiercePharmaMerck’s vaccine approval poses threat to one of Pfizer’s top-selling products MarketWatchMerck Wins US Approval for Pneumonia Vaccine to Rival Pfizer’s BloombergNew Merck pneumococcal vaccine wins FDA approval STAT