Research has revealed how, in diabetics, high levels of blood sugar disrupt the function of key cell subsets in the lungs that regulate the immune response. It also identifies a potential strategy for reversing this susceptibility and saving lives. Prof. Eran Elinav's team subjected multiple mouse models of types 1 and 2 diabetes to a variety of viral lung infections. The immune reaction, which in nondiabetics eliminates the infection and drives tissue healing, was severely impaired in the diabetic mice, leading to uncontrolled infection, lung damage and eventual death. "High blood sugar levels severely disrupt certain subsets of dendritic cells...