Outbreaks of seasonal influenza amongst student and university populations have been previously reported [12, 13] . These outbreaks have resulted in increased absenteeism, impaired school performance, and increased health care utilization [14] . The first reported university outbreak of 2009 pandemic H1N1 occurred at the University of Delaware (UD), affecting an estimated 10 % of the student population. It spread rapidly through the University of Delaware community with a surge in illness over a 2-week period. Although severe illness was rare in this instance, the authors documented that the outbreak caused a substantial burden and challenge to the university health care system [15] . In Japan, Uchida et al. reported that the infection rate among university students they surveyed ranged from 4.3 % to 15.5 % during the 2009 pandemic [16] . The authors suggested that continued exposure to sick individuals and disease transmission occurred during the pandemic, mainly through university club activities.