Influenza pandemic was a global event in 2009 and intraschool transmission was its main spread method. The present study was designed to evaluate the absenteeism rate during the type A influenza epidemic. Four hundred and eight students from both a guidance school and high school in the Iranian capital were recruited in this retrospective study. The number of days of absenteeism, since the beginning of the school year until the end of the epidemic was recorded. Two hundred and thirteen students missed school during the disease epidemic because of related causes. In other words, 581 person day absences were reported during this period. The influenza pandemic has led to an increase in the absenteeism rate and may negatively affect the academic performance of the students. Teaching precautionary measures is an effective tool in reducing the number of days of sickness.

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Background:The most important factors affecting students' learning ability are attention and concentration, which are impaired by daytime sleepiness in classroom. Objectives: This study was conducted to determine the effect of nasal septal deviation on daytime sleepiness and school performance among high school students. Patients and Methods: This study comprised 172 high school male students, who were examined for septal deviation by a practitioner. Daytime sleepiness was determined by school consultants. Grade point average (GPA) was considered as an index for school performance. Results: Nasal septal deviation was significantly more prevalent among sleepy students (46.8%) compared to their attentive peers (22.8%, P < 0.05). Although the GPAs in students with septal nasal deviation were lower than other students, the difference was not statistically significant. Conclusions: It is not unlikely that nasal cavity deformities such as septal deviation that results in sleep disturbances would lead to poor school performance in students. However, the question to be answered is whether deviated nasal septum is the only cause of poor performance of students or it involves some other mechanisms. Further studies are needed to confirm this relationship and whether reconstruction of structural anomalies of the nasal cavity in students prevents daytime sleepiness and subsequently improves their school performance.