Epidemiology and social networks
Excerpt: By definition, noncommunicable diseases cannot be transmitted. However, there is recent evidence of the op- posite, involving a change of scientific paradigm. We have a notion that cardiovascular diseases, cancer and diabetes are noncontagious. Actually, there are no physical mechanisms that help spread these diseases. Nevertheless, risk factors of several noncommunicable diseases—such as obesity, al- coholism and smoking—are spread across populations.
Epidemiology and social networks, Carlos Gershenson, Cir Cir 2011;79:199-200