2024 Yes https://doi.org/10.1186/s12889-024-19555-x Alcantara, Daniel Maximo Correa South America Observational Epidemiology Study Students Staff Elementary (K-5) Middle/Jr High (6-8) High School (9-12) Viruses COVID rates School community School closures Epidemiology Genomic surveillance Pandemic Researchers used RT-qPCR and sequencing in 23 Campo Grande schools to track SARS-CoV-2 in students and staff from 2021–2022. Findings highlight the importance of long-term school-based surveillance to inform public health response and preparedness.