Figure 3
From: School closures during the 2009 influenza pandemic: national and local experiences
Extent of school, grade and class closures in participating countries. A: total number of schools affected by closures* during the 2009 H1N1pdm09 influenza pandemic; B: number of schools affected by closures during the 2009 H1N1pdm09 influenza pandemic per 1 million inhabitants. ( *: e.g., may include complete school closure, grade closure and/or class closure).