Figure 2From: Predictors of indoor absolute humidity and estimated effects on influenza virus survival in grade schools Hourly changes in absolute humidity and school-day CO 2 . Time series of average CO2 and indoor absolute humidity during the school day for the week of January 31 to February 4, 2011 in School 1. The dashed line represents mean CO2 levels measured every 5 minutes. The solid line is average indoor absolute humidity for the same week.Back to article page