​​Since 5 June, ECDC has published on its website weekly updates on spatial distribution of West Nile fever cases in the European Union and neighbouring countries. Cases reported in the EU were autochthonous human WN fever cases (neuro-invasive and non neuro-invasive), meeting laboratory criteria as per EU case definition (Directive 2008/426/EC) and all reported cases outside the EU.

​On 6 November 2013, Public Health Authorities in French Polynesia reported of an outbreak of sub-febrile and eruptive syndrome due to Zika virus spreading across the archipelago since week 41 of 2013. An outbreak of dengue type 1 and 3 is on-going in the archipelago since February 2013.

​The Hellenic Centre for Disease Control and Prevention (KEELPNO) has reported three autochthonous cases of Plasmodium vivax malaria up to 16 November 2013.

​As of 19 December 2013, the local health authorities of the French Caribbean Islands reported 26 confirmed and 12 probable autochthonous cases of chikungunya on the island of Saint Martin.

​An outbreak of chikungunya in the Caribbean region was reported from the French part of the island of Saint Martin on 5 December 2013.

​It is the first time that autochthonous transmission of the virus has been documented in the Americas. Clinicians and travel medicine clinics should remain vigilant regarding imported dengue and chikungunya cases from the Caribbean.

​An outbreak of chikungunya in the Caribbean region was reported from the French part of the island of Saint Martin on 6 December 2013. It is the first time that autochthonous transmission of the virus has been documented in the Americas.

​​An outbreak of chikungunya in the Caribbean region was reported from the French part of the island of Saint Martin on 6 December 2013. It is the first time that autochthonous transmission of the virus has been documented in the Americas.

​On 6 December 2013, France reported two laboratory-confirmed autochthonous cases of chikungunya in the French part of the Caribbean island of Saint Martin. It is the first time that autochthonous transmission of the virus has been documented in the Americas.

French authorities reported a cluster of four autochthonous cases of chikungunya infection in Languedoc-Roussillon region, south of France. This is the first report of autochthonous chikungunya virus transmission in France this year.