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.
To view all outbreak updates for a thread, press on the blue circled number below an outbreak post.
Chikungunya in Saint Lucia
As of 5 March 2026, a confirmed case of chikungunya has been reported in Saint Lucia. The Ministry of Health notes that several countries in the area have recently reported increases in chikungunya activity. Given the movement of people between territories and the presence of the Aedes mosquito locally, Saint Lucia remains at risk for additional cases. Please see our Topics in Brief article below for further details on chikungunya.
Cholera in Zambia
Between 5 August 2025 and 4 March 2026, a total of 1,133 cholera cases and 18 deaths have been reported. The highest number of cases have been recorded in Mpulungu (417 cases), Lusaka (326 cases), and Nsama (161 cases). Please see our Topics in Brief article below for further details on cholera.
Mpox in Madagascar
Between 18 December 2025 and 4 March 2026, Madagascar reported 492 confirmed mpox cases and one death across 34 districts. The outbreak epicentre is currently Mahajanga I, with 264 confirmed cases. Clade Ib has been detected in Madagascar. Please see our Topics in Brief article below for further details on mpox.
Chikungunya in Argentina
As of 2 March 2025, 200 suspected cases of chikungunya (13 confirmed) have been reported in Salta province since the start of 2026. Six of the confirmed cases reported no history of travel indicating local transmission is occurring. Please see our Topics in Brief article for further details on chikungunya.
Lassa fever in Nigeria
As of 22 February 2026, a total of 1,989 suspected Lassa fever cases (404 confirmed, 43 deaths) have been reported since the start of 2026. Confirmed cases have been reported in 18 states, with 84% of confirmed cases reported from Ondo, Bauchi, Edo and Taraba. Please see our Topics in Brief article for further details on Lassa fever.
Yellow fever in Venezuela
As of 25 February 2026, a total of 36 confirmed yellow fever cases have been reported in Venezuela since this outbreak began in June 2025. These cases were in 42 municipalities across 14 states. 61% of cases have been reported in Apure, Táchira, Lara, Mérida, Barinas, Portuguesa, Cojedes and Guárico. Cases have been noted in parts of Lara and Aragua states where yellow fever vaccination is not usually recommended. Please see our Topics in Brief article for further details on yellow fever.
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.
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.
Chikungunya in Seychelles
As of 27 February 2026, over 70 chikungunya cases were reported in European travellers returning from the Seychelles since November 2025. Please see our Topics in Brief article for further details on chikungunya.
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.
Welcome to our outbreak surveillance section. This page contains information on disease outbreaks and other incidents that are considered to be of relevance to UK travellers.
You can search the information by disease or by country.
We regularly review and update information on overseas disease outbreaks and other health issues that may affect the UK traveller. 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.
You can search our Outbreak Surveillance information by disease or by country.
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.
If you wish to use the following content for official purposes, please refer to the original sources of information. 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.
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
|
Follow Foreign, Commonwealth & Development Office (FCDO) advice. This may mean avoiding non-essential travel, or all travel. Subscribe to the FCDO destination advice for security updates and travel warnings. |
|
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.
The categories do not replace Foreign, Commonwealth and Development Office (FCDO) travel advice. Travellers should still check the FCDO travel advisories for any country-specific security or safety alerts.
