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.

18 September 2026

Mpox in Estonia

In August 2026, one new clade I mpox case was reported in Estonia. This is the first case of clade I mpox in Estonia. Please see our Topics in Brief article for further details on mpox.

Take extra precautions
18 September 2026

Mpox in Iceland

In August 2026, one new clade I mpox case was reported in Iceland. This is the first case of clade I mpox in Iceland. Please see our Topics in Brief article for further details on mpox.

Take extra precautions
18 September 2026

Mpox in Malta

In August 2026, three new clade I mpox cases were reported in Malta. These are the first cases of clade I mpox in Malta. Please see our Topics in Brief article for further details on mpox.

Take extra precautions
18 September 2026
Germany + Frankfurt

Malaria in Germany

On 17 September 2026, one fatal case of malaria was reported in Schwanheim district, Frankfurt, Germany. The case was one of two cases of malaria, resident in the Schwanheim district. The case was believed to have been infected by a mosquito introduced from an endemic area by aircraft to Frankfurt Airport and neither worked at the airport or had recent travel history. The latest infections and death brings the total to eight infections and three fatal cases. Please see our Topics in Brief article for further details on malaria.

Take usual precautions
Outbreak updates (latest first)
Frankfurt

As of 27 August 2026, a total of six malaria cases, including two deaths, have been reported from individuals working at Frankfurt Airport. There is no increased risk to the general public. Please see our Topics in Brief article for further details on malaria.

Source: State
16 September 2026
Liberia + Bong
Grand Bassa
Nimba

Lassa fever in Liberia

As of 30 August 2026, 33 cases (11 deaths) of Lassa fever have been reported since the start of the year. The outbreak remains active in Bong, Grand Bassa and Nimba counties. Please see our Topics in Brief article for further details on Lassa fever.

Take usual precautions
Outbreak updates (latest first)
BongGrand BassaNimba

As of 14 June 2026, 23 cases (nine deaths) of Lassa fever have been reported since the start of the year. Bong, Bassa, and Nimba counties are reported to be experiencing outbreaks. 242 confirmed Lassa fever cases including 75 deaths have been reported in Liberia since January 2022. Please see our Topics in Brief article for further details on Lassa fever.

Source: State
BongGrand Bassa

Between 6 January 2022 and 12 January 2025, 180 confirmed Lassa fever cases and 56 deaths have been reported in Liberia. Most cases were reported from Suakoko and Grand Bassa County. Please see our Topics in Brief article for further details on Lassa fever.

Source: State

A prolonged outbreak of Lassa fever has been reported in 14 out of 15 counties in Liberia. As of 15 November 2024, 212 cases (38 confirmed, 174 suspected) and 11 deaths have been reported during 2024. Please see our Topics in Brief article for further details on Lassa fever.

Source: Africa CDC

Since the beginning of 2024, 11 cases of Lassa fever have been reported in Liberia.

Source: State
BongGrand BassaMontserradoNimba

From 6 January 2022 to 28 May 2023, a total of 75 laboratory confirmed Lassa fever cases, including 20 deaths, have been reported.

Source: State

As of 4 April 2022, a total of 46 suspected cases of Lassa fever (including 19 confirmed and 6 deaths) have been reported in Liberia since the beginning of the year.

Source: WHO
16 September 2026
USA + New York

Legionnaires' disease in USA

As of 15 September 2026, 12 confirmed cases of Legionnaires' disease, including one death have been reported in a community cluster in Melrose and Morrisania neighbourhoods of South Bronx, New York City.

Take usual precautions
Outbreak updates (latest first)
New York

As of 20 July 2026, 76 confirmed cases of Legionnaires' disease, including four deaths have been reported in a community cluster in Upper East Side neighbourhoods of Carnegie Hill and Yorkville, New York City.

Source: State

As of 14 July 2026, 63 confirmed cases of Legionnaires' disease have been reported.

Source: State
New York

Between 2 and 9 July 2026, 46 confirmed cases of Legionnaires' disease have been reported in Upper East Side, New York City, United States.

Source: State
15 September 2026

Lassa fever in Sierra Leone

The World Health Organisation reported that on 3 March 2026, a 36-year-old pregnant woman died in Bonthe District, Sierra Leone, after testing positive for Lassa fever. The last Lassa fever outbreak in Sierra Leone was reported in February 2025. Please see our Topics in Brief article for further details on Lassa fever.

Take usual precautions
15 September 2026

Mpox in Ireland

As of 28 August 2026, a total of 24 clade Ib mpox cases have been reported in Ireland since January 2024. Please see our Topics in Brief article for further details on mpox.

Take extra precautions
10 September 2026
Italy + Rome

Chikungunya in Italy

As of 4 September 2026, the first locally acquired case of chikungunya for 2026 has been confirmed in the municipality of Rome in Italy. Please see our Topics in Brief article for further details on chikungunya.

Take usual precautions
10 September 2026
South Sudan + Jonglei
Warrap

cVDPV2 in South Sudan

As of 2 September 2026, a total of three circulating vaccine-derived poliovirus type 2 (cVDPV2) cases were reported from Jonglei and Warrap states in South Sudan. These are the first cVDPV2 cases reported in 2026. Onset of paralysis was reported in May, June and July 2026 respectively. Please see our Topics in Brief article for further details on polio.

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.