Please note that not all cases of disease or outbreaks are reported; some outbreaks may only be reported if they occur outside of the usual recognised risk area or season, or they have been reported in greater than usual numbers. See 'About Outbreaks' tab below for further detail.
For further information on red, amber and green alert categories, see About Outbreaks tab.
Chikungunya in Réunion
As of 12 May 2025, over 47,500 confirmed chikungunya cases and over 170,000 consultations for suspected chikungunya have been reported since August 2024. In 2025, a total of 340 hospital admissions, with 12 deaths linked to chikungunya, have been reported. All municipalities have reported cases, with southern areas most affected, particularly Le Tampon. The French National Authority for Health (HAS) have withdrawn vaccination in people over 65 years whilst a small number of possible adverse reactions in this age group are investigated. Please see our Topics in Brief article for further details on chikungunya.
As of 30 April 2025, over 44,000 confirmed chikungunya cases (including 9 deaths) on the island since the start of 2025. The outbreak is ongoing and widespread throughout Réunion. The French National Authority for Health (HAS) have withdrawn vaccination in people over 65 years whilst a small number of possible adverse reactions in this age group are investigated. Please see our Topics in Brief article for further details on chikungunya.
Source: StateAs of 23 April 2025, a total of 39,532 chikungunya cases (including 9 deaths) have been reported on the island since the start of 2025. The outbreak is ongoing and widespread throughout Réunion and health officials have reported a new upward trend in cases. Please see our Topics in Brief article for further details on chikungunya.
Source: StateAs of 30 March 2025, a total of 27,521 locally acquired chikungunya cases have been reported since the start of 2025. The outbreak is ongoing and widespread throughout Réunion. Please see our Topics in Brief article for further details on chikungunya.
Source: StateAs of 23 March 2025, a total of 20,242 locally acquired chikungunya cases and two deaths have been reported since August 2024. The outbreak is ongoing and widespread throughout Réunion. Please see our Topics in Brief article for further details on chikungunya.
Source: StateAs of 12 March 2025, a total of 13,594 locally acquired chikungunya cases and two deaths have been reported since August 2024. Please see our Topics in Brief article for further details on chikungunya.
Source: StateOn 19 March 2025, it was reported that between 23 August 2024 and 9 March 2025, 8,749 locally acquired cases of chikungunya were reported in Réunion. This is an addition of 3,565 cases since the last report on 12 March 2025. Please see our Topics in Brief article for further details on chikungunya.
Source: StateAs of 12 March 2025, a total of 5,184 locally acquired chikungunya cases have been reported since August 2024. This includes 5,041 cases reported since the beginning of 2025. Please see our Topics in Brief article for further details on chikungunya.
Source: StateAs of 5 March 2025, a total of 3,390 locally acquired chikungunya cases have been reported since August 2024. This includes 3,245 cases reported since the beginning of 2025. Please see our Topics in Brief article for further details on chikungunya.
Source: StateAs of 25 February 2025, a total of 1,773 locally acquired chikungunya cases have been reported since August 2024. This including 1,631 cases reported since the beginning of 2025. Please see our Topics in Brief article for further details on chikungunya.
Source: StateBetween 27 January and 2 February 2025, a total of 204 new cases have been reported. Since 23 August 2024, a total of 783 indigenous cases have been reported, including 671 cases since the beginning of 2025. Please see our Topics in Brief article for further details on chikungunya.
Source: StateBetween 20-26 January 2025, 31 new chikungunya cases were reported in Réunion. During this period the municipality of Trois-Bassins reported a case for the first time. Six outbreaks currently remain active. Since 23 August 2024, a total of 339 locally acquired cases have been reported in Réunion, of these 200 cases were reported in 2025. Prior to the outbreak that began on 23 August, the last locally acquired case detected in Réunion was during 2014. Please see our Topics in Brief article for further details on chikunguyna.
Source: StateAs of 13 January 2025, a total of 192 cases of chikungunya have been reported since 23 August 2024. Municipalities in the south of the island have been most affected, in particular the town of L'Etang Sale where 90 cases have been reported. Please see our Topics in Brief article for further details on chikungunya.
Source: StateAs of 22 November 2024, Regional Health Agency Reunion have reported a total of 20 confirmed cases of locally acquired chikungunya since 23 August 2024 when the first case in ten years was identified. Outbreaks remain active in the west of the island. Please see our Topics in Brief article for further details on chikungunya.
Source: StateOn 23 August 2024, a locally acquired case of chikungunya was reported. This is the first locally acquired case on the island in more than 10 years.
Source: StateZika in Burkina Faso
As of 30 April 2025, a confirmed case of Zika virus disease, with no history of recent travel, has been reported in Burkina Faso. Please see our Topics in Brief article for further details on Zika.
Mpox in Germany
On 29 April 2025, the World Health Organization reported an additional confirmed case of clade Ib mpox, bringing the total number of clade Ib mpox cases in Germany to 10. Please see our Topics in Brief article for further details on mpox.
As of 9 April 2025, a confirmed case of mpox clade Ib, linked to travel to Africa, has been reported in Germany. A suspected case of mpox in a family member is also being investigated. Please see our Topics in Brief article for further details on mpox.
Source: StateAs of 14 January 2025, a total of seven cases of mpox clade I have been reported by Germany (one in October, five in December 2024 and one in January 2025). Please see our Topics in Brief article for further details on Mpox.
Source: ECDCAs of 11 January 2025, the World Health Organization has confirmed a total of six mpox clade Ib cases in Germany. Three cases were among travellers from affected countries in Africa and three cases were household contacts of one of these travellers. Please see our Topics in Brief article for further details on mpox.
Source: WHOOn 16 December, four mpox clade Ib cases were reported in Rheinisch-Bergisch district. This family cluster includes two children and were probably acquired from a family member who had travelled to affected regions in Africa. In October 2024 a previous case of mpox clade Ib imported from Rwanda was reported. Please see our Topics in Brief article for further details on mpox.
Source: StateOn 24 October 2024, it was confirmed that the imported case of mpox clade Ib had travelled from Rwanda.
Source: StateOn 18 October 2024, a case of mpox clade Ib has been confirmed in Germany, connected to travel abroad.
Source: StateInfluenza A(H5N1) in Mexico
On 2 April 2025, the World Health Organization were notified of a laboratory-confirmed human infection with an avian influenza A(H5N1) virus in the state of Durango. This case represents the second reported human infection with avian influenza A(H5) in Mexico, and the first confirmed case of infection with an influenza A(H5N1) virus in the country. Please see our Topics in Brief article for further details on avian influenza.
Influenza A(H5N1) in Vietnam
On 18 April 2025, the Ho Chi Minh City Department of Health in Vietnam reported a case of encephalitis in an 8 year old child caused by avian influenza A(H5N1). The case is currently isolated and being treated in intensive care. Please see our Topics in Brief article for further details on avian influenza.
Cholera in Haiti
As of 29 March 2025, a total of 1,298 suspect cases of cholera, including 19 deaths, were reported. Increasing cases have been noted especially in Cité Soleil and Arcahaie as result of internal displacement and a deterioarting humanitarian situation. Please see our Topics in Brief article for further details on cholera.
Malaria in Belize
On the 15 April 2025, the Government of Belize reported locally transmitted malaria cases in Santa Elena Town and Cristo Rey Village in Cayo District (in the West close to the border with Guatemala). These are the first locally acquired cases in Belize in over six years. Please see our Topics in Brief article for further details on malaria.
Meningococcal disease in Saudi Arabia
On 11 April 2025, the World Health Organization reported a total of 17 confirmed invasive meningococcal disease cases in multiple countries. All cases were linked to pilgrims who performed Umrah in Saudi Arabia between 7 January and 18 March 2025. Please see our Topics in Brief article for further details on meningococcal disease.
Measles in Afghanistan
As of 5 April 2025, 31,818 suspected cases of measles, including 208 deaths have been reported since the start of 2025. The trend in measles cases this year is higher than the previous three year average (2022-2024). Please see our Topics in Brief article for further details on measles.
Legionnaires' disease in Australia
As of 10 April 2025, six cases of Legionnaires' disease have been reported in individuals who all spent time in Sydney's Central Business District in the past three weeks. The source of infection is not yet known. Please see here for information about Legionnaires' disease.
NaTHNaC regularly review and update information on disease outbreaks and other health issues that may affect the UK traveller. You can search the information by disease or by country in our Outbreak Surveillance section.
The information comes from a wide variety of sources and can be used along with the Country Information section of our website where you will find recommendations on vaccines, malaria and other risks for each country (where relevant).
Please note that not all cases of disease or outbreaks are reported. In some countries, there may be limited surveillance and reporting processes in place so information can be difficult to obtain. Some diseases may only be reported if they occur outside of the usual recognised risk area or season, or they have been reported in greater than usual numbers. Outbreaks of those diseases included in the UK childhood vaccination programme are not usually reported unless the outbreak is unusual or unexpected.
The information presented in the disease surveillance reports is collated from a variety of sources, including government bodies, international organisations and the media. The verification status of each report is clearly indicated. Verified reports are confirmed by official sources. Some unverified reports are included to ensure timely dissemination of information and where possible we will try to substantiate these reports, although confirmation may not always be possible. Unverified reports may be subject to change, misreporting and may later prove to be unsubstantiated. They should not therefore be regarded as official.
Where available, a web link is provided to the original information source. We cannot accept responsibility for the sites to which it links, or for the information found on those sites. Linking to outside sites does not in any way imply endorsement of these sites. If you wish to use the following content for official purposes, please refer to the original sources of information.
Key to NaTHNaC alert level feature
LEVEL 1: GREEN |
Take usual precautions
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Follow standard protective measures, as recommended for this destination, disease or situation. Be aware that advice may change and check for updates. |
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LEVEL 2: AMBER |
Take extra precautions
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Follow any additional precautions recommended. Be alert and check regularly for changes in advice about this ongoing situation. Advice may be relevant for all travellers or apply to a specific group of travellers. |
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LEVEL 3: RED |
FCDO advise against travel
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The Foreign, Commonwealth & Development Office (FCDO) advise against travel on health grounds. This may mean avoiding non-essential travel, or all travel, follow the FCDO advice for details. Please note we do not report on FCDO safety and security alerts. Travellers should check the FCDO travel advisories for their destination for this information. |
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Alert categories are based on the situation at the time of publication. They will not be routinely updated unless outbreak information or a news item is updated.
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