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.

04 March 2026

Chikungunya in Mayotte

As of 27 February 2026, 219 cases of chikungunya have been reported in Mayotte since the start of the year. Please see our Topics in Brief article for further details on chikungunya.

Take usual precautions
04 March 2026

Dengue in Timor-Leste

Between 1 and 28 February 2026, 2,105 cases of dengue were reported from Timor-Leste. Please see our Topics in Brief article for further details on dengue.

1
Take usual precautions
27 February 2026
Togo + Centrale

cVDPV2 in Togo

In the week ending 25 February 2026, one case of circulating vaccine-derived poliovirus type 2 (cVDPV2) was confirmed in Togo. This is the first reported case of cVDPV2 in Togo since 2022. Please see our Topics in Brief article for more details on polio.

Take usual precautions
23 February 2026
Senegal + Tambacounda

Crimean-Congo haemorrhagic fever in Senegal

As of 18 February 2065, one confirmed case of Crimean-Congo haemorrhagic fever (CCHF) has been reported in Tambacounda region. Please see our Topics in Brief article for further details on CCHF.

Take usual precautions
23 February 2026
Zambia + Lusaka

cVDPV2 in Zambia

As of 22 February 2026, the Zambia Ministry of Health reported a cVDPV2-positive environmental sample from Lusaka. Please see our Topics in Brief article for further details on polio.

Take usual precautions
23 February 2026

Mpox in Spain

As of 17 February 2026, a total of 82 cases of mpox clade Ib have been reported in Spain. 62 of these cases have been reported in men who have sex with men (MSM). Please see our Topics in Brief article for further details on mpox.

2
Take extra precautions
23 February 2026
Namibia + Khomas
Omaheke

cVDPV2 in Namibia

As of 18 February 2026, the Global Polio Eradication Initiative reported two cVDPV2-positive environmental samples from Omaheke and Khomas, collected on 7 January 2026. Please see our Topics in Brief article for further details on polio.

1
Take usual precautions
19 February 2026

Dengue in Brazil

As of 1 Feburary 2026, 62,707 cases (eight deaths) of dengue have been reported in Brazil since the start of the year. Case numbers usually increase during the first few months of the year. A total of 1,453,633 confirmed cases (1,793 deaths) were reported during 2025. Serotypes DENV-1, DENV-2, DENV-3 and DENV-4 were all reported. Please see our Topics in Brief article for further details on dengue.

11
Take usual precautions
19 February 2026

Dengue in Colombia

As of 25 January 2026, 9,383 suspected cases (two deaths) of dengue have been reported in Colombia since the start of the year. Case numbers usually increase during the first few months of the year. A total of 125,119 cases (124 deaths) were reported during 2025. Serotypes DENV-1, DENV-2, DENV-3 and DENV-4 were all reported. Please see our Topics in Brief article for further details on dengue.

4
Take usual precautions
19 February 2026

Dengue in Paraguay

As of 25 January 2026, 2,412 suspected cases of dengue have been reported in Paraguay since the start of the year. Case numbers usually increase during the first few months of the year. A total of 31,656 suspected cases were reported during 2025. Serotypes DENV-1, DENV-2 and DENV-3 were reported. Please see our Topics in Brief article for further details on dengue.

2
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.