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.

29 December 2025

Chikungunya in Hong Kong

As of 29 December 2025, a total of 77 confirmed chikungunya cases (nine classified as local), including one death, have been reported in Hong Kong for 2025. Please see our Topics in Brief article for further details on chikungunya.

3
Take usual precautions
23 December 2025

Dengue in Guatemala

As of 29 November 2025, a total of 44,654 dengue cases, with six deaths, have been reported in Guatemala for 2025. Serotypes DENV-1, DENV-2 and DENV-3 have been reported. Please see our Topics in Brief article for further details on dengue.

Take usual precautions
23 December 2025

Mpox in Romania

On 22 December 2025, the World Health Organization reported the first detection of mpox clade Ib in Romania. This case was confirmed in an adult with history of travel to China in August 2025. No additional cases have been reported in Romania. Please see our Topics in Brief article for further details on mpox.

Take extra precautions
23 December 2025

Dengue in Mexico

As of 13 December 2025, a total of 141,421 dengue cases (21,344 confirmed) with 85 deaths, have been reported in Mexico for 2025. Serotypes DENV-1, DENV-2, DENV-3 and DENV-4 have all been reported. Please see our Topics in Brief article for further details on dengue

9
Take usual precautions
22 December 2025

Hantavirus in Bolivia

As of 15 November 2025, 48 cases of hantavirus pulmonary syndrome (including 11 deaths) have been reported in Bolivia during 2025. This total doubles the average reported in 2023 and 2024. Cases have been recorded in the Departments of La Paz, Tarija, Beni and Santa Cruz with 93% being exposed in rural areas. Please see UKHSA guidance for more details on hantavirus.

Take usual precautions
19 December 2025

Mpox in Netherlands

As of 18 December 2025, a total of 10 cases of mpox clade Ib have been reported in the Netherlands. Of these cases, nine have been reported in the last six weeks. World Health Organization consider there to be community transmission of the virus in the Netherlands. Please see our Topics in Brief article for further details on mpox.

1
Take extra precautions
15 December 2025

Dengue in Mali

As of 30 November 2025, a total of 4,042 suspected dengue cases (931 confirmed) have been reported in Mali during 2025. Cases have been reported in all 11 regions of the country. Please see our Topics in Brief article for further details on dengue.

4
Take usual precautions
09 December 2025
Namibia + Kunene
Otjozondjupa

Cholera in Namibia

As of 3 December 2025, a total of 24 cholera cases (13 confirmed) and one death have been reported for 2025 in Kunene and Otjozondjupa regions. Prior to 2025, the last reported cholera outbreak was in 2014. Please see our Topics in Brief article for further details on cholera.

Take usual precautions
09 December 2025

Mpox in Greece

On 8 December 2025, the World Health Organization reported the first detection of mpox clade Ib in Greece. This case was confirmed in an adult with recent history of travel to the Middle East. Please see our Topics in Brief article for further details on mpox.

Take extra precautions
09 December 2025

Dengue in Mauritania

As of 3 December 2025, a total of 7,280 dengue cases (4,050 confirmed) and one death, have been reported since this outbreak began in May 2025. Serotypes DENV-1 and DENV-2 have been identified. Cases have been reported in 13 out of 15 regions countrywide, with 35% of confirmed cases in South Nouakchott region. Please see our Topics in Brief article for further details on dengue.

1
Take usual precautions

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
Follow standard protective measures, as recommended for this destination, disease or situation. Be aware that advice may change and check for updates.
LEVEL 2: AMBER
Take extra precautions
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.
LEVEL 3: RED
FCDO advise against travel
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.

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.