Getting to grips with Zika virus
Registration is now open for our next 'Getting to Grips' webinar of 2026
NaTHNaC
Online 
IXCHIQ chikungunya vaccine marketing authorisation revoked by MHRA
Based on a further benefit-risk assessment for travellers, the UK marketing authorisation has been revoked by MHRA
Ebola disease
The outbreak remains a public health emergency of international concern
Natural hazards and health risks
Advice for travellers visiting areas affected by natural hazards
Updated dengue 'green book' chapter published
The dengue chapter of the 'green book' (Immunisation against infectious disease) has been updated
Polio: Public Health Emergency of International Concern
An update on the polio Public Health Emergency of International Concern (PHEIC)
Mefloquine shortage
Shortage of 250mg mefloquine (Lariam) antimalarial tablets in the United Kingdom (UK) continues
Telephone advice line for health professionals: change to opening hours
The advice line opening hours will change from 7 September 2026
Cyclospora and summer travel
A reminder about Cyclospora infection and how to reduce your risk
Changes to NaTHNaC telephone contact numbers
Our Advice Line and General Enquiries telephone number change has been deferred to Autumn 2026
Mpox in Norway
A total of five clade I mpox cases have been reported in Norway in the past 12 months (October 2025 to September 2026). Both clade I and II mpox have been reported in Norway. Please see our Topics in Brief article for further details on mpox.
Mpox in Hungary
A total of 10 clade I mpox cases have been reported in Hungary in the past 12 months (October 2025 to September 2026). Clade I mpox was reported in Hungary for the first time in 2026. Clade II mpox has been reported in Hungary previously. Please see our Topics in Brief article for further details on mpox.
Mpox in Poland
A total of 21 clade I mpox cases have been reported in Poland in the past 12 months (October 2025 to September 2026). Clade Ib mpox has been reported among sequenced mpox cases in Poland. Please see our Topics in Brief article for further details on mpox.
West Nile virus in USA
As of 13 October, a total of 1,328 human cases of West Nile virus have been reported across 45 states in the United States. Of these, 1,004 cases were reported to be the neuroinvasive form. The highest number of cases were reported in California (310 cases), Arizona (95), and Texas (80 cases). Please see our Topics in Brief article for further details on West Nile virus.
As of 1 September 2026, a total of 407 human cases of West Nile virus have been reported across 40 states in the United States. Of these, 285 cases were reported to be the neuroinvasive form. The highest number of cases have been reported in Arizona (88 cases), California (66 cases) and Texas (46 cases). Please see our Topics in Brief article for further details on West Nile virus.
Source: CDCAs of 11 August 2026, a total of 181 human cases of West Nile virus have been reported across 30 states in the United States this year. Of these, 129 cases were reported to be the neuroinvasive form. The highest number of cases have been reported in Arizona (73 cases), Texas (23 cases), and California (18 cases). Please see our Topics in Brief article for further details on West Nile virus.
Source: StateCholera in Zambia
As of 14 October 2026, a total of 909 cases, including 149 confirmed cases and 25 deaths, have been reported in Zambia since the cholera outbreak was declared on 28 July 2026. Cases have been reported across 12 districts in five provinces with the highest number of cases reported in Lusaka (457 cases) and Chibombo (221 cases) districts. Please see our Topics in Brief article for further details on cholera.
On 30 September 2026, Zambia's Ministry of Health declared a new cholera outbreak. As of 29 September 2026, there have been 304 cases, of which 62 cases have been laboratory confirmed, with 11 deaths. Cases have been reported in seven districts across five provinces. Please see our Topics in Brief article for further details on cholera.
Source: StateNorth Kivu
South Kivu
Bas-Uele
Tshopo
Haut-Uele
Sud-Ubangi
Ebola disease in DRC
As of 10 October 2026, a total of 8,978 confirmed Ebola disease (Bundibugyo virus) cases and 4,336 deaths have been reported in the Democratic Republic of the Congo, in seven provinces: Ituri, North Kivu, South Kivu, Tshopo, Haut-Uele, Bas-Uele and South Ubangi. Please see our Topics in Brief article for further details on Ebola disease.
Chikungunya in French Guiana
As of 8 October 2026, a total of 2,065 confirmed chikungunya cases have been reported in French Guiana this year. Please see our Topics in Brief article for further details on chikungunya.
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.
Source: StateAs of 29 May 2026, 513 cases of chikungunya have been confirmed in French Guiana during the current year. Please see our Topics in Brief article for further details on chikungunya.
Source: StateAs of 21 May 2026, a total of 249 laboratory confirmed chikungunya cases have been reported in French Guiana since the first locally acquired case was reported in January 2026. Please see our Topics in Brief article for further details on chikungunya.
Source: ECDCAs of 27 March 2026, 65 cases of chikungunya have been reported in French Guiana during 2026. The most affected region is the Western Littoral/West Shore area. Please see our Topics in Brief article for further details on chikungunya.
Source: StateAs of 5 February 2026, four locally acquired (autochthonous) cases of chikungunya have been reported from French Guiana. Investigations have not revealed any link between these cases, indicating that the virus is already circulating widely within the local mosquito population. These are the first locally acquired cases on French Guiana since 2017. Please see our Topics in Brief article for further details on chikungunya.
Source: StateOn 27 January 2026, local health authorities reported the first locally acquired (autochthonous) chikungunya case in French Guiana since 2014. The case tested positive on 21 January 2026 and had not recently travelled abroad. Please see our Topics in Brief article for further details on chikungunya.
Source: StateDengue in Italy
As of 8 October 2026, the Italian authorities confirmed the 68 locally acquired dengue cases reported for 2026 were in the following regions: Campania (2), Lazio (1), Lombardy (2), Puglia (20), Tuscany (36) and Veneto (7). Please see our Topics in Brief article for further details on dengue.
As of 7 October 2026, a total of 68 confirmed locally acquired dengue cases have been reported for 2026 in Italy. Please see our Topics in Brief article for further details on dengue.
Source: ECDCAs of 29 September 2026, a total of 59 confirmed locally acquired dengue cases have been reported for 2026 in Italy. Please see our Topics in Brief article for further details on dengue.
Source: StateAs of 22 September 2026, a total of 47 confirmed locally acquired dengue cases have been reported for 2026 in Italy. The cases have been reported in Puglia (13), Tuscany (31), Lombardy (2), Campania (1) regions of Italy. Please see our Topics in Brief article for further details on dengue.
Source: StateAs of 8 September 2026, a total of 24 confirmed locally acquired dengue cases have now been reported for 2026 in the Puglia and Tuscany regions of Italy. Please see our Topics in Brief article for further details on dengue.
Source: StateAs of 30 August 2026, a total of three confirmed locally acquired dengue cases have been reported during 2026 in the Puglia and Tuscany regions of Italy. Please see our Topics in Brief article for further details on dengue.
Source: StateDiphtheria in Niger
As of 27 September 2026, 949 suspected cases of diphtheria and 36 deaths have been reported in Niger from 50 of 72 health districts. Please see our Topics in Brief article for further details on diphtheria.
Dengue in USA
As of 3 October 2026, 296 cases of locally acquired dengue have been reported in Florida, USA. The outbreak has surpassed Florida's previous annual high of 200 cases, reported in 2023. DENV-2 and DENV-3 have been identified amongst cases in 2026. Please see our Topics in Brief article for further details on dengue.
As of 26 September 2026, 252 cases of locally acquired dengue were reported in Florida, USA. The outbreak has surpassed Florida's previous annual high of 200 cases, reported in 2023. Dengue serotypes 2 and 3 have been identified amongst cases in 2026. Please see our Topics in Brief article for further details on dengue.
Source: StateBetween 6 and 12 September 2026, 41 new cases of locally acquired dengue were reported in Florida, bringing the total for 2026 to 152. Please see our Topics in Brief article for further details on dengue.
Source: StateAs of 29 August 2026, 73 cases of locally acquired dengue have been confirmed in Florida, USA. Please see our Topics in Brief article for more details on dengue.
Source: StateAs of 22 August 2026, a total of 41 locally acquired dengue cases have been reported in Florida in 2026. Serotypes DENV-2 and DENV-3 have been confirmed. Please see our Topics in Brief article for further details on dengue.
Source: StateAs of 15 August 2026, a total of 23 locally acquired cases of dengue have been confirmed in Florida during 2026. Serotypes DENV-2 (20) and DENV-3 (2) have been confirmed. Please see our Topics in Brief article for further details on dengue.
Source: StateAs of 3 August 2026, a locally acquired case of dengue has been confirmed in Florida, Miami-Dade County. Please see our Topics in Brief article for further details on dengue.
Source: StateAs of 28 July 2026, a locally acquired case of dengue has been confirmed in Hillsborough County, Florida. Please see our Topics in Brief article for further details on dengue.
Source: StateThe Yellow Fever Zone
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