Study of social contact patterns in Hong Kong will give insight into spread of epidemic. The first ever long-term study of patterns of social contact in Hong Kong will improve our knowledge of the growth of epidemics. Hong Kong was where SARS emerged in 2002-2003. The study looked at the number and type of social encounters made by 1,450 residents. This is affected by age but 'supermixers' are not necessarily more likely to contract or spread disease. Source 3i.