Out of 4,061 students from the two schools, 167 suspected cases were identified (Overall AR=41.%). Only 56% (94/167) were sampled, of which 32%(30/94) were H3N2 positive. School-specific attack rates were 5% (75/1536) for school A, and 4% (92/2525) in school B.  Mean age of confirmed cases in both schools was 16+2 years.  Form 1 students constituted the highest positivity in both schools 90% (27/30). The index case was from school B, who was a 17-year-old male without travel history. Dormitories were congested and with poor ventilation. Suspected cases in both schools were quarantined for seven days and treated according to standard guidelines. A piggery was found in school A. There was only one functional hand washing facility in school A. 