TY - JOUR A1 - Hill, A.L. A1 - Rand, D.G. A1 - Nowak, M.A. A1 - Christakis, N.A. T1 - Emotions as Infectious Diseases in a Large Social Network: the SISa model Y1 - 2010 DO - 10.1098/rspb.2010.1217 JF - Proceedings of the Royal Society B: Biological Sciences VL - 277 IS - 1701 SP - 3827 EP - -3835 ER -