** Shares of vaccine developer Vaxcyte Inc PCVX.O fall 3% to $36.69
** Brokerage Leerink cuts PCVX's PT to $65 from $153
** PCVX said on Monday its experimental pneumococcal vaccine for infants, VAX-24, achieved "non-inferiority" in a mid-stage study compared to rival Pfizer's PFE.N Prevnar 20 shot
** Although we believe that VAX-24 is a safe and approvable vaccine, we now have less confidence that both VAX-24 & VAX-31 will deliver highly compelling efficacy in future infant datasets - brokerage
** Leerink notes that the infant results do not affect its high expectations for VAX-31 in adults
** PCVX shares have faced significant pressure due to investor concerns about U.S. health secretary Robert F. Kennedy Jr.'s stance on vaccines, Leerink says
** Up to last close, PCVX was down ~54% YTD
(Reporting by Juby Babu in Mexico City)
((Juby.Babu@thomsonreuters.com;))