Evacuees, who fled from the vicinity of Fukushima Daiichi nuclear power plant, sleep at an evacuation center set in a gymnasium in Kawamata, Fukushima Prefecture, in northern Japan on March 14, 2011. Shared living spaces and sanitary facilities, such as those in these large community evacuation centers, obviously expose people to crowded living conditions. As a result, evacuees may be at particular risk for respiratory infections and diarrheal diseases. Careful attention needs to be paid to illness screening and infection control, including hand-washing, personal hygiene, sanitizing of surfaces, and laundry and garbage management. (Yuriko Nakao/Reuters)