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.
cVDPV3 in Spain
In September 2025, a vaccine-type polio enterovirus (cVDPV3) has been detected in environmental samples at two wastewater treatment plants in Baix Llobregat (Catalonia area). Please see our Topics in Brief article for further details on polio.
West Nile virus in Spain
On 16 September 2025, the Andalusia Ministry of Health in Spain reported the first locally acquired human case of West Nile virus (WNV) for the 2025 transmission season. The case was detected in a resident of Mojácar (Almeria) and back dated to July 2025. Please see our Topics in Brief article for further details on West Nile virus.
Chikungunya in Bangladesh
Between 1 January and 31 August 2025, the Institute of Epidemiology, Disease Control and Research in Bangladesh have reported a total of 732 suspected cases of chikungunya in Dhaka. Of these, 400 cases were laboratory-confirmed. Please see our Topics in Brief article for further details on chikungunya.
Malaria in Greece
On 3 September 2025, the Greek authorities reported two probable locally transmitted cases of malaria (Plasmodium falciparum) in a rural area of Central Greece (Sterea Ellad). Symptom onset in both cases was late July/early August 2025. No further malaria cases have been detected during field investigations. Please see our Topics in Brief article for further details on malaria.
Chikungunya in Hong Kong
As of 11 September 2025, a total of 16 confirmed imported chikungunya cases have been reported in Hong Kong. From 2016 to 2019, Hong Kong recorded between one and 11 imported cases annually. Please see our Topics in Brief article for further details on chikungunya.
Acute watery diarrhoea in Nepal
Between 9 August and 7 September 2025, a total of 1,171 cases of acute watery diarhhoea have been reported in Birgunj Meteropolitan City.
Rabies in Thailand
On 9 September 2025, a rabies alert was announced for several areas in Bangkok. People have been advised to avoid contact with stray animals and seek prompt medical advice if bitten or scratched. Please see our Topics in Brief article for further details on rabies.
Oropouche virus disease in Brazil
As of 8 September 2025, a total of 11,967 confirmed cases of Oropouche virus disease and seven deaths (five confirmed, two under investigation) have been reported in Brazil for 2025. The most affected state is Espirito Santo with 6,323 cases and one death, followed by Rio De Janeiro with 2,500 cases and five deaths, and Minas Gerais with 1,367 cases. Please see our Topics in Brief article for further details on Oropouche virus disease.
Dengue in French Polynesia
As of 2 September 2025, a total of 2,577 dengue cases (2,312 confirmed and 265 probable) have been reported in French Polynesia since November 2023. Please see our Topics in Brief article for further details on dengue.
Dengue in Kiribati
As of 2 September 2025, a total of 446 confirmed and 1,213 suspected dengue cases, with one confirmed death, have been reported in Kiribati since April 2025. Co-circulation of DENV-1 and DENV-2 serotypes have been identified. Please see our Topics in Brief article for further details on dengue.
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.
