Vaxcyte, Inc., a clinical-stage vaccine innovation company, develops conjugate and novel protein vaccines to prevent or treat bacterial infectious diseases. Its lead vaccine candidate is VAX-24, a 24-valent carrier-sparing investigational pneumococcal conjugate vaccine (PCV) for the prevention of invasive pneumococcal disease (IPD) in infants. The company also develops VAX-31, a 31-valent, carrier-sparing investigational PCV for the prevention of IPD in adults and children; VAX-A1, a novel conjugate vaccine candidate to prevent disease caused by Group A Streptococcus; VAX-PG, a novel protein vaccine candidate targeting the keystone pathogen responsible for periodontitis; and VAX-GI, a novel preclinical vaccine candidate for the treatment of dysentery and shigellosis, which is caused by Shigella bacteria. The company was formerly known as SutroVax, Inc.