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(updated on 2015/08/13)

X generations 代代相傳

Map created by CUHK SpatioEpi Group

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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.

2015年4月底,一名南韓居民到中東公幹,逗留期間感染中東呼吸綜合症。他回南韓首爾後開始發病, 5月初至中曾先後到過3間醫療機構求診,確診後再轉至另一間機構。這段時間於不知情下他傳染病毒給太太、同病房病人及到醫院探病的人士(第一代)。第二代感染者因接觸第一代感染人士或曾到過第一代感染人士逗留的醫療機構而感染。地圖顯示南韓政府公佈有確診者到過的24間醫療機構。第一代感染人數比例隨時間減少,而第二代則後來居上,並覆蓋多間醫療機構。在南韓,中東呼吸綜合症病毒的主要傳播途徑是接觸受感染人士,但有部分可能是從有確診者的醫療機構的環境受病毒感染。從第一個案(5月20日)計起的第三個星期,已經錄得超過100個確診個案。這個驚人數字使南韓成為累積感染人數第二高的國家。