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.
Hantavirus - unknown origin
As of 7 May 2026, a total of eight hantavirus cases (five confirmed) including three deaths associated with a cruise ship have been reported by the World Health Organization (WHO). The type of virus in this outbreak has been confirmed as Andes hantavirus. The vessel departed Ushuaia, Argentina, on 1 April 2026 and followed a route across the South Atlantic. The WHO are working closely with national authorities of all affected countries to ensure appropriate public health measures are in place. Risk to the global population is low.
Measles in Bangladesh
As of 5 May 2026, a total of 5,467 confirmed measles cases and 41,793 suspected cases with 259 deaths have been reported in Bangladesh for 2026. Please see our Topics in Brief article for further details on measles.
Dengue in Tonga
As of 5 May 2026, a total of 56 confirmed dengue cases have now been reported in Tonga. The highest number of cases have been reported from Tongatapu Island. Dengue virus serotype 2 (DENV-2) has been confirmed. Please see our Topics in Brief article for further details on dengue.
Mpox in Luxembourg
Between April 2025 and March 2026, one clade I mpox case was reported in Luxembourg. This is the first clade I mpox case reported in Luxembourg. Please see our Topics in Brief article for further details on mpox.
cVDPV2 in Australia
On 1 May 2026, an environmental detection of circulating vaccine-derived poliovirus type 2 (cVDPV2) from a wastewater sample was reported in Perth, Western Australia. Please see our Topics in Brief article for further details on polio.
Mpox in Denmark
On 27 April 2026, the number of confirmed clade Ib mpox cases in Denmark has increased to four. One case has reported no travel history abroad, indicating locally acquired infection. Please see our Topics in Brief article for further details on mpox.
Mpox in Poland ex Slovakia
On 13 April 2026, the first detection of clade I mpox in Poland was confirmed. The clade subtype is unspecified. The case is an adult male who had a travel history to Slovakia. No onward transmission associated with this case has been reported. Please see our Topics in Brief article for further details on mpox.
Yellow fever in Ecuador
On 25 April 2026, Ecuador's Ministry of Health reported a fatal human case of yellow fever in an 11-year-old child in Joya de los Sachas Canton, Orellana Province. This is the first human case of yellow fever in Ecuador in nine months. Please see our Topics in Brief article for further details on yellow fever.
Mpox in Madagascar
Between 18 December 2025 and 25 April 2026, a total of 1,196 confirmed mpox cases and three deaths have been reported in Madagascar. Clade Ib mpox has been detected amongst confirmed cases. Please see our Topics in Brief article for further details on mpox.
cVDPV2 in Malawi
In the week ending 22 April 2026, one cVDPV2-positive environmental sample was reported from Southern Province, Malawi, collected on 19 February 2026. Please see our Topics in Brief article for further 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
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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. Please note we do not report on FCDO specific travel advice where the FCDO advises British people against ‘all but essential travel’ or ‘all travel’ to a particular country. For changes to travel advice for a specific country, you can sign up to receive email alerts. |
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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.
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.
