Study Commentary: Decreased Antibiotic Use for Acute Otitis Media and Acute Sinusitis Following Implementation of Childhood PCV13 Immunization. 8 Jul, 2021 | 08:54h | UTC Decreased Antibiotic Use for Acute Otitis Media and Acute Sinusitis Following Implementation of Childhood PCV13 Immunization – NEJM Journal Watch Original study: Impact of the 13-valent pneumococcal conjugate vaccine on acute otitis media and acute sinusitis epidemiology in British Columbia, Canada – Journal of Antimicrobial Chemotherapy