Vaxcyte, Inc., a clinical-stage biotechnology vaccine company, develops novel protein vaccines to prevent or treat bacterial infectious diseases. Its lead vaccine candidate is VAX-24, a 24-valent investigational pneumococcal conjugate vaccine that is in Phase 1/2 clinical trials to treat invasive pneumococcal disease and pneumonia. The company also develops VAX-XP to protect against emerging strains and address antibiotic resistance; VAX-A1, a conjugate vaccine candidate designed to treat Group A Strep; and VAX-PG, a novel protein vaccine candidate targeting keystone pathogen responsible for periodontitis.