<p>We employed a cross-sectional study design. Teachers, health workers and students from the two schools were interviewed, and cases records reviewed. A case was defined as any person with fever (&gt;38), and either cough or sore throat from 1st May-10th June 2022 from the schools. We actively searched for cases and collected nasopharyngeal samples of some suspected cases for testing. A line-list was developed with sociodemographic, laboratory and risk factor variables. We conducted descriptive analysis and estimated attack rates.</p>