This case report shows how easily this virus can move from one traveler from Singapore to a resort in France and then to other countries. It highlights the difficult task ahead of us of contact tracing and isolation.

At the time this report was written, almost half of the confirmed COVID-19 cases in the United Kingdom were part of a large cluster of 13 British nationals who tested positive for SARS-CoV-2 in the UK, Spain, and France. Transmissions in this cluster happened at one ski resort in France and originated from a single infected traveler returning from a conference in Singapore where he acquired the virus.

At least 21 individuals were exposed, tested, and quarantined, and 13 of those tested positive between February 6th and 15th. It’s worth noting here the number of individuals infected, the absence of any severe illness among those infected, and one case of a “delayed positive” test during isolation after initially testing negative, at least a week after the last possible contact.