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.

22 July 2026
Venezuela + Anzoategui

Hantavirus in Venezuela

As of 21 July 2016, three deaths from hantavirus have been reported in Boca del Pao, Anzoátegui State. Please see UKHSA guidance for more details on hantavirus.

Take usual precautions
22 July 2026

Dengue in Peru

As of 28 June 2026, 34,820 cases (36 deaths) of dengue have been reported in Peru since the start of the year. A total of 39,211 cases (56 deaths) were reported during the whole of 2025. Serotypes DENV-1, DENV-2 and DENV-3 have been recorded. Please see our Topics in Brief article for further details on dengue.

5
Take usual precautions
22 July 2026

Crimean-Congo haemorrhagic fever in Afghanistan

The World Health Organization have reported 483 suspected cases (21 deaths) of Crimean-Congo haemorrhagic fever (CCHF) during June 2026 alone. This represents a 174% increase compared to the 176 cases and nine deaths reported in the May 2026. Please see our Topics in Brief article for further details on CCHF.

5
Take usual precautions
21 July 2026

Measles in Guatemala

As of 11 July 2026, a total of 27,145 measles cases have been reported in 2026. The substantial increase in case numbers reflects a retrospective update of cases in Guatemala and a change in case reporting. Please see our Topics in Brief article for further details on measles.

1
Take usual precautions
16 July 2026

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.

Take usual precautions
16 July 2026

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.

Take usual precautions
16 July 2026

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.

Take usual precautions
16 July 2026
New Zealand + Wellington

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.

Take usual precautions
16 July 2026

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.

Take usual precautions
16 July 2026

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.

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.