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Original article

Vol. 150 No. 0910 (2020)

Preliminary case report on the SARS-CoV-2 cluster in the UK, France, and Spain

  • Emma B Hodcroft
Cite this as:
Swiss Med Wkly. 2020;150:w20212


Almost half of the confirmed COVID-19 cases detected so far in the United Kingdom are part of a large cluster of 13 British nationals who tested positive for SARS-CoV-2 in the UK, Spain, and France. Transmissions among this cluster occurred at a ski resort in France, and originated from a single infected traveller returning from a conference in Singapore where he acquired the virus. At least 21 individuals were exposed to the virus, tested, and quarantined, with 13 of those testing positive between the period of 6th February and 15th February. Here, all publicly available information about the primarily UK/France cluster is consolidated, providing a complete and accessible summary of the cases and their connections. Notable in this cluster are the number of individuals infected, the apparent absence of any severe illness among those infected, and a case of a “delayed positive” test during isolation after initially testing negative, at least 7 days after last possible contact.


  1. Chen L, Liu W, Zhang Q, Xu K, Ye G, Wu W, et al. RNA based mNGS approach identifies a novel human coronavirus from two individual pneumonia cases in 2019 Wuhan outbreak. Emerg Microbes Infect. 2020;9(1):313–9. doi:.
  2. Nishiura H, et al. The Rate of Underascertainment of Novel Coronavirus (2019-nCoV) Infection: Estimation Using Japanese Passengers Data on Evacuation Flights. J Clin Med. 20204;9(2).
  3. Guan Wj, et al. Clinical characteristics of 2019 novel coronavirus infection in China. medRxiv, 2020.02.06.20020974
  4. Huang C, Wang Y, Li X, Ren L, Zhao J, Hu Y, et al. Clinical features of patients infected with 2019 novel coronavirus in Wuhan, China. Lancet. 2020;395(10223):497–506. doi:.
  5. The Novel Coronavirus Pneumonia Emergency Response Epidemiology Team. The Epidemiological Characteristics of an Outbreak of 2019 Novel Coronavirus Diseases (COVID-19) — China. China CDC Wkly. 2020;2:1.
  6. Yu P, Zhu J, Zhang Z, Han Y, Huang L. A familial cluster of infection associated with the 2019 novel coronavirus indicating potential person-to-person transmission during the incubation period. J Infect Dis. 2020;jiaa077. doi:.
  7. Rothe C, Schunk M, Sothmann P, Bretzel G, Froeschl G, Wallrauch C, et al. Transmission of 2019-nCoV Infection from an Asymptomatic Contact in Germany. N Engl J Med. 2020;•••:NEJMc2001468. doi:.
  8. Zhang W, Du RH, Li B, Zheng XS, Yang XL, Hu B, et al. Molecular and serological investigation of 2019-nCoV infected patients: implication of multiple shedding routes. Emerg Microbes Infect. 2020;9(1):386–9. doi:.
  9. WHO Emergency Committee. Novel Coronavirus (2019-nCoV) Situation Report – 35
  10. Koh A. Singapore COVID-19 Cases ‒ 20 Feb
  11. Ministry of Health. Singapore, Updates on COVID-19 (Coronavirus Disease 2019)
  12. Wee SL, Inoue M. What a Party in Japan May Tell Us About the Coronavirus’s Spread. The New York Times
  13. Staff, agencies, South Korean city on high alert as coronavirus cases soar at “cult” church. The Guard.
  14. Suddeutsche Zeitung, Coronavirus News: China andert erneut die Statistik. Suddeutsche Zeitung
  15. Seedat J, ed. SARS-CoV-2 in Deutschland und Ziele von Infektionsschutzmaßnahmen, (Robert Koch Institut, Berlin), Technical Report 7/2020 (2020).
  16. Bernard Stoecklin S, Rolland P, Silue Y, Mailles A, Campese C, Simondon A, et al.; Investigation Team. First cases of coronavirus disease 2019 (COVID-19) in France: surveillance, investigations and control measures, January 2020. Euro Surveill. 2020;25(6). doi:.
  17. jo, jo on Twitter: "@MeyerBjoern #coronavirus I made a translated version (I hope this is Ok @SZ?) of the figure of the Bavarian cluster of #nCoV2019 (12 cases) source note: This is based on a newspaper figure, no official document!" / Twitter
  18. T See Kit K. Choy, What we know about the 3 local transmission clusters of coronavirus. Channel News Asia
  19. Vaswani K. Why a global city is so vulnerable to virus spread. BBC News
  20. Five Britons BBC. in French chalet catch coronavirus. BBC News
  21. Siddique H. “Super-spreader” brought coronavirus from Singapore to Sussex via France. The Guard.
  22. Asia CN. More than 100 people attended meeting at Grand Hyatt Singapore linked to Malaysia, South Korea coronavirus cases. Channel News Asia
  23. Topping A, Badshah N. Coronavirus: new UK and Mallorcan cases linked to French ski resort cluster. The Guard.
  24. Coronavirus: cinq nouveaux cas en France annonce Buzyn, deux écoles fermées en Haute-Savoie. Le
  25. The Local. French Alps coronavirus patients among 11 people infected by same man. TheLocal.FR
  26. Sky News. UK coronavirus victim infected five more Britons at French ski resort. Sky News
  27. The Sun. Coronavirus cases in UK DOUBLES to 8 ‒ as patients “forcibly quarantined”. The Sun
  28. Bullmore H. Gatwick flight passengers will be contacted after one on board confirmed as coronavirus patient. The Arg.
  29. UK coronavirus “superspreader” says his thoughts are with those infected. Sky News
  30. Bullmore H. “Business as usual” for pub after coronavirus patient visited venue. The Arg.
  31. Walker E. Cornerstone Community Centre staff self-isolate over Coronavirus. The Arg.
  32. Murray J, et al. Two UK prisoners being tested as vaccine could be ready in 18 months – as it happened. The Guard.
  33. Mullin G, Brown A. Coronavirus cases in UK DOUBLES to 8 ‒ as patients “forcibly quarantined”. The Sun
  34. Donnelly L, Ward V, Johnson J. Pressure on health chiefs over British coronavirus “super spreader”. The Telegr.
  35. Ward V, Gardner B, Donnelly L. Coronavirus cases double in UK in 24 hours. The Telegr.
  36. Bullmore H. Coronavirus in Brighton and Hove: what we know so far. The Arg.
  37. Coronavirus LIVE updates as five cases confirmed in Brighton. The Arg.
  38. Department of Health and Social Care. CMO confirms third case of coronavirus in England
  39. Doherty-Cove J. Coronavirus super spreader Steve Walsh released from hospital. The Arg.
  40. Pennetier M. 5 U.K. citizens contract coronavirus at French ski resort. Glob. News
  41. Charlton A. 5 Britons with virus hospitalized in France after Alps stay. Bus. Insid.
  42. A Bal, et al., Sequence BetaCoV/France/RA739/2020|EPI_isl_410486 on GISAID collected 2020-02-08, (CNR Virus des Infections Respiratoires ‒ France SUD, 103 Grande Rue de la Croix-Rousse, 69317 cedex 04 Lyon, France), Technical report (2020).
  43. Elbe S, Buckland-Merrett G. Data, disease and diplomacy: GISAID’s innovative contribution to global health. Glob. Challenges 1, 33–46
  44. Shu Y, McCauley J. GISAID: Global initiative on sharing all influenza data ‒ from vision to reality. Euro Surveill. 2017;22(13):30494. doi:.
  45. American dies of coronavirus; five Britons hospitalized with virus in France. Stars Stripes
  46. Baldacchino J. Coronavirus: premier décès en France, un douzième cas identifié. France inter
  47. Fourgeaud G. Grenoble: Agnès Buzyn rend visite aux patients anglais présumés porteurs du coronavirus. France Bleu
  48. British father in Mallorca becomes Spain’s second confirmed coronavirus case. The Local.ES
  49. Jones J. Spanish authorities confirm Briton is country’s second coronavirus case. Reuters
  50. Couzens G. Brit dad-of-two, 46, tests positive for coronavirus in Majorca hospital after contact with another patient. The Sun
  51. Coronavirus case in Majorca is confirmed. Majorca Dly. Bull.
  52. La Conselleria de Salut i Consum, La Conselleria de Salut i Consum de les Illes Balears ha activat el protocol de coronavirus 2019-nCoV davant la detecció a Mallorca de quatre persones que varen tenir contacte amb un cas confirmat
  53. La Conselleria de Salut i Consum. Els resultats confirmen que l’home en investigació i ingressat a Son Espases té coronavirus 2019-nCoV, mentre que la dona i les filles han donat negatiu i es troben asimptomàtiques
  54. La Conselleria de Salut i Consum. Les mostres de l’home ingressat a Son Espases confirmen un segon negatiu per SARS-CoV-2
  55. LC de Salut i Consum. Les anàlisis de les mostres de 4 casos en investigació per Coronavirus 2019-nCoV donen negatiu
  56. Couzens G, Kitching C. British dad tests positive for coronavirus in Majorca as wife and kids cleared. mirror
  57. Seven year old suspected with Coronavirus admitted to Son Espases Hospital. Majorca Dly. Bull.
  58. From Singapore via the French Alps to Spain: How the coronavirus reached the island of Mallorca. TheLocal.ES
  59. LC de Salut i Consum. Per primera vegada les mostres de l’home ingressat a Son Espases han donat negatiu per SARS-CoV-2
  60. Department of Health and Social Care. CMO confirms fourth case of coronavirus in England
  61. Department of Health and Social Care. Chief Medical Officer for England announces four further coronavirus cases
  62. Campbell D, Perraudin F. Coronavirus: number of confirmed UK cases rises from four to eight. The Guard.
  63. Merrifield R. Scout leader suspected of being coronavirus “super spreader’ who infected eleven. mirror
  64. Merrifield N. Two GP practices close due to coronavirus as GP tests positive. Pulse Today
  65. le Duc F. Brighton doctors’ surgery undergoes deep clean over coronavirus concerns. Bright. Hove News
  66. Walker E. Locum GP with coronavirus is identified. The Arg.
  67. Doherty-Cove J. A&E worker diagnosed with coronavirus. The Arg.
  68. Doherty-Cove J. A&E worker treated patients for two days before being diagnosed with coronavirus, leaked memo shows. The Arg.
  69. Wadsworth J. Hove pub visited by coronavirus dad says it’s “business as usual’. Bright. Hove News
  70. Fagge N, Matthews S, Boyd C, Blanchard S, Robinson M. Locum GP who caught coronavirus from super-spreader. Mail. Online
  71. Bazaraa D. Yoga class “at risk of coronavirus’ amid fears “super spreader’ attended. mirror
  72. Wadsworth J. Closed GP surgery reopens and thanks patients for patience. Bright. Hove News
  73. Churchman L. Thirty doctors in coronavirus isolation, says clinician. The Arg.
  74. Churchman L. Council press briefing took place after someone with coronavirus had been in room. The Arg.
  75. Perraudin F, et al. First case of coronavirus confirmed in London – as it happened. The Guard.
  76. Bullmore H. “We have been abandoned’ ‒ Fears for baby son suspected of having coronavirus. The Arg.
  77. Hartley-Parkinson R. Desperate hunt for people at London conference where coronavirus patient went. Metro
  78. Many more’ may self-isolate over UK coronavirus. BBC News
  79. Ikonen C. Sixth Brit who visited French ski chalet tests positive for coronavirus. The Arg.
  80. Coronavirus: un premier décès et 12 cas confirmés en France, près de 1700 morts en Chine. SudOuest
  81. Ministère des Solidarités et de la Santé. Coronavirus COVID-19: un douzième cas confirmé en France
  82. Walker E. Coronavirus latest: What we know so far. The Arg.
  83. Eight of nine UK coronavirus patients discharged. BBC News
  84. Churchman L. Family who contracted virus from businessman discharged from hospital. The Arg.
  85. Bourgine B. Coronavirus: les patients anglais de Grenoble ont pu quitter l’hôpital. France Bleu
  86. Coronavirus VG. un troisième Français contaminé à bord du paquebot «Diamond Princess».