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.
Zika in United Kingdom ex Malaysia
The UK Health Security Agency (UKHSA), have confirmed a case of Zika virus in a traveller who had returned from Malaysia in January 2026. Please see our Topics in Brief article for further details on Zika virus.
Zika in United Kingdom ex Maldives
The UK Health Security Agency (UKHSA), have confirmed a case of Zika virus in a traveller who had returned from the Maldives in February 2026. Please see our Topics in Brief article for further details on Zika virus.
Zika in United Kingdom ex Singapore
The UK Health Security Agency (UKHSA), have confirmed a case of Zika virus in a traveller who had returned from Singapore in February 2026. Please see our Topics in Brief article for further details on Zika virus.
Influenza A(H5N1) in New Zealand
On 15 July 2026, the first detection of avian influenza A(H5N1) in New Zealand was reported in a seabird (brown skua). The government of New Zealand has advised risk to the public is low. Please see our Topics in Brief article for further details on avian influenza.
Chikungunya in United Kingdom ex Sri Lanka
As of 14 July 2026, a total of 18 chikungunya cases linked to travel to Sri Lanka, were reported in the UK for 2026. Please see our Topics in Brief article for further details on chikungunya.
Dengue in India
As of 13 July 2026, a total of 22,938 dengue cases have been reported in India during 2026. Please see our Topics in Brief article for further details on dengue.
Measles in Maldives
As of 13 July 2026, a total of 144 confirmed measles cases have been reported in the Maldives for 2026, with 141 cases reported between May and July 2026. This outbreak is concentrated in the Greater Malé Area, with one case each reported from Addu City, Alif Alif Atoll, Himandhoo Island and Ozen Reserve Bolifushi Resort. Please see our Topics in Brief article for further details on measles.
Zika in United Kingdom ex Indonesia
As of 14 July 2026, a total of four cases of Zika virus disease linked to travel to Indonesia, were reported in the UK in 2026. Please see our Topics in Brief article for further details on Zika virus.
Zika in United Kingdom ex Thailand
As of 14 July 2026, a total of two cases of Zika virus disease linked to travel to Thailand, were reported in the UK in 2026. Please see our Topics in Brief article for further details on Zika virus.
Dengue in Sri Lanka
As of 15 July 2026, Sri Lanka has reported a total of 72,430 dengue cases, with 49 deaths, during 2026. Please see our Topics in Brief article for further details on dengue.
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.
