Household caregiver and teacher instruction to children/students on the use of nonpharmaceutical interventions (NPIs), by concern about being infected with influenza H1N1.

* Pearson's Chi-square test was used to compare NPIs between caregivers who reported concern and non-concerned caregivers. †Pearson's Chi-square test was used to compare NPIs between caregivers and teachers. Differences were considered statistically significant if p<0.05.