Pfizer (NYSE:PFE) said it is planning on filing a supplemental Biologics License Applications (sBLA) for its 20-valent pneumococcal conjugate vaccine candidate in infants by the end of the year. After announcing positive data from a pivotal U.S. Phase 3 study (NCT04382326), the company said the 20vPnC vaccine candidate, if approved, would offer the broadest serotype…