2024 Yes https://doi.org/10.3389/fpubh.2024.1408281 Schuster, Jennifer E. North America Observational Epidemiology Study Students Staff Elementary (K-5) Middle/Jr High (6-8) High School (9-12) Viruses Infections Acute respiratory illness Respiratory virus Students Teachers Surveillance This study used surveillance and PCR testing on 6,315 respiratory specimens from a Missouri school district, with 28% testing positive. Results show that school-based surveillance can detect outbreaks early and support effective public health response.