(updated on 2015/08/13)
X generations 代代相傳
In late April 2015, a Korean citizen travelled to Middle East and became infected with MERS-CoV. On his return to Seoul he felt sick and attended treatment at 3 medical institutions in early to middle of May before the condition was diagnosed. He was later transferred to another medical institution after diagnosis. Unknowingly he passed on the virus to his wife and institution roommates, and visitors to the same medical institution (first generation infections). Second generation infections occurred when others were exposed to first generation cases in healthcare settings. The map shows the distribution of 24 medical institutions that were visited by confirmed cases. The proportion of first generation infections fell with time, and they were replaced by second generation infections diagnosed at later time-points and in institutions further away. In South Korea the main mode of MERS-CoV transmission is direct contact with infected persons, while a proportion probably contracted the virus in the healthcare environment. Three weeks after the first case was reported on 20 May, the total number of confirmed cases has exceeded 100. South Korea has become a country with the highest number of cumulative cases, secondary only to Saudi Arabia.
Data for the map were taken from multiple media sources and official government releases, including Centre for Health Protection in Hong Kong.