A total of 430 students (47.4% female) from 17 preschools have absenteeism data recorded since November 27, 2010. From March 1, 2011 onward, a total of 1437 students (47.6% female) from 47 preschools (including 30 public preschools) have absenteeism data recorded. The mean weekly overall absenteeism rate from November 27, 2010, to July 12, 2011, was 23.2% (maximum 32.4%, minimum 13.6%, standard deviation 4.5%), whereas the mean weekly absenteeism rate due to sickness was 2.3% (maximum 4.0%, minimum 0.7%, standard deviation 1.0%). We are currently seeking reference disease surveillance data to evaluate the accuracy of this system and negotiating with the village chiefs to set up disease surveillance data dissemination points for risk communication with the villagers.