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.
Dengue in Malaysia
As of 12 August 2026, a total of 56,319 dengue cases have been reported in Malaysia during 2026. Please see our Topics in Brief article for further details on dengue.
Chikungunya in French Guiana
As of 2 August 2026, 1,418 confirmed chikungunya cases have been reported in French Guiana this year. Please see our Topics in Brief article for further details on chikungunya.
Hantavirus in France
On 6 August 2026, one case of Hantavirus Andes virus (ANDV) was reported in a French-Argentine citizen who travelled through France in late July. The case is now isolating in Spain and is asymptomatic. Please see our Topics in Brief article for further details on hantavirus.
Chikungunya in Nicaragua
As of 3 August 2026, the US Centers for Disease Control and Prevention (CDC) have reported increased cases of chikungunya in Nicaragua, with most cases in Managua. Please see our Topics in Brief article for further details on chikunguna.
Dengue in USA
On 4 August 2026, the Virginia Department of Health reported a confirmed dengue virus infection in a resident who did not have known travel outside of Virginia prior to disease onset. The case had been in close proximity to a recent internationally acquired dengue case. There is no evidence of continued transmission and no additional reports of locally acquired dengue cases.
Zika in USA ex Fiji
As of 4 August 2026, the US Centers for Disease Control and Prevention (CDC) have reported three laboratory-confirmed Zika virus infections in US travellers for whom Fiji was the only destination visited. The cases were confirmed in May 2025, March and June 2026. Please see our Topics in Brief article for further details on Zika virus.
Ebola disease in Uganda
On 28 July 2026, the Ministry of Health of Uganda declared the end of the Ebola disease outbreak in Uganda, after 42 days without a new confirmed locally transmitted case. The last confirmed case was discharged on 16 June 2026. Please see our Topics in Brief article for further details on Ebola disease.
Chikungunya in Guinea
The first locally acquired case of chikungunya has been confirmed in Guinea. Details are included in a study published on 30th July 2026. Further details on date and location of detection are not yet available. Please see our Topics in Brief article for further details on chikungunya.
West Nile virus in Canada
On 30 July 2026, the first case of West Nile virus during 2026 was reported in Toronto, Canada. Please see our Topics in Brief article for further details on West Nile virus.
Cyclosporiasis in United Kingdom ex Mexico and USA
Between 30 April and 15 July 2026, 67 cases of cyclosporiasis were reported in the UK (30 in England, 27 in Scotland and 10 in Wales). Of the 51 cases with travel information available, 48 reported travel to Mexico, with one reporting both travel to Mexico and the USA.
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
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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. 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. |
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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.
