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Diffusion : site du ministère de la Santé, du travail et des affaires sociales japonais Date : le 20 février 2020 The Cruise ship “Diamond princess” arrived at the port of Yokohama on February 3rd, and is currently undergoing quarantine measures. Since the morning on February 5th,  all passengers have been required to stay put in the respective guest  rooms in order to minimize the spread of the virus, and the infection  prevention measures have been taken ever since. URL : https://www.mhlw.go.jp/stf/seisakunitsuite/newpage_00001.html