Research and analysis

Outbreaks under monitoring: week 25 (week ending 21 June 2026)

Updated 25 June 2026

The following signal relates to an ongoing outbreak, with data as of 24 June 2026

Disease or pathogen	Bundibugyo virus disease (BVD)
Location	Multi-country
Status	Update
Reporting date	15 May to 24 June 2026
Summary	On 15 May 2026, an outbreak of Ebola disease caused by Bundibugyo virus was declared in the Democratic Republic of the Congo (DRC) and Uganda. On 17 May 2026, the World Health Organization (WHO) Director-General determined that the outbreak constitutes a public health emergency of international concern. As of 22 June 2026 (in French), 1,094 confirmed cases and 277 confirmed deaths have been reported in the DRC. This is an increase of 257 confirmed cases and 81 deaths since the last outbreaks under monitoring report. Confirmed cases have been reported in Ituri (997 cases), North Kivu (94 cases), and South Kivu (3 cases) provinces. In Uganda, as of 23 June 2026, 20 confirmed cases (including 2 deaths) have been reported. Of the confirmed cases, 15 were imported from the DRC and 5 were secondary cases among contacts. On 24 June 2026, France’s Ministry of Health (in French) reported a confirmed travel-associated case in a humanitarian doctor returning from the DRC. On arrival in France, the case was transferred to a specialised health facility and is reported to be in a stable condition. Epidemiological investigations to identify contacts are underway. This is the 17th recorded Ebola disease outbreak in the DRC since the virus was first identified in 1976. The last reported outbreak, in Kasai Province, ended in December 2025. Bundibugyo virus was first identified in 2007 in Bundibugyo district, western Uganda. A second outbreak caused by Bundibugyo virus was reported in DRC in 2012. WHO assesses the risk of this event as very high in the DRC, high for Uganda and countries with land borders adjoining countries with documented Bundibugyo virus detection, and low for the remaining countries in the African region, and globally. As of 23 June 2026, no imported cases associated with this outbreak have been reported in the UK. Previous experience from the 2014 to 2016 West Africa outbreak suggests a limited importation risk, with only one travel-related case reaching the UK outside of medical evacuations. The risk of the current outbreak to the UK population is assessed as low.
Further information	Ebola: overview, history, origins and transmission Ebola virus disease: clinical management and guidance Ebola and Marburg haemorrhagic fevers: outbreaks and case locations UKHSA blog:  What is Ebola and how does it spread? NaTHNaC country information page: Democratic Republic of the Congo and Uganda

Epidemiological week 25, 15 to 21 June 2026

Disease or pathogen	Crimean-Congo haemorrhagic fever (CCHF)
Location	Spain
Status	New
Reporting date	15 June 2026
Summary	On 25 June 2026, the Ministry of Health of Castilla and Leon (in Spanish), Spain, reported a confirmed human case of CCHF in Salamanca province. The case is a 68-year-old male who was transferred from Salamanca to Madrid after presenting with symptoms resembling CCHF. Samples taken from the case were tested at the National Centre for Microbiology where the CCHF virus was confirmed. Investigations found that the case had been bitten by a tick. In response, health authorities have traced contacts for monitoring, and information on prevention of tick bites has been made available to the public and health professionals. Human cases of CCHF have been reported in Salamanca previously, including during 2025 (in Spanish). CCHF is not present in the UK, nor are there any identified established populations of Hyalomma ticks, the principal vectors of CCHF virus. Confirmed CCHF cases have been imported into the UK, including one fatal case in 2012 and one in 2014.
Further information	Crimean-Congo haemorrhagic fever: origins, reservoirs, transmission and guidelines HAIRS risk assessment: Crimean-Congo haemorrhagic fever NaTHNaC country information page: Spain