The DRC's Bundibugyo virus outbreak reached 2,905 confirmed cases and 1,269 deaths by 22 July 2026, with Ituri as epicentre and 47 of 140 health zones affected; Uganda's 42-day countdown is underway after 20 cases and two deaths. Exported cases include two US workers (to Germany and Czechia), a French doctor, and an asymptomatic UK resident in London. In Canada, Ontario and Nova Scotia report rising anaplasmosis cases amid tick expansion. France recorded its first two autochthonous dengue cases of 2026 in Tarn and Hérault. Chikungunya is expanding in Costa Rica (47 cases, CDC Level 2 notice), French Guiana (1,157 cases, 210 hospitalizations), and Samar, Philippines (329 cases). Sweden reports a 54% rise in tick-borne encephalitis (213 cases), linked to climate change.
Ebola virus disease, D.R. Congo, ECDC-update
As of 22 July 2026, the DRC reported 2,905 confirmed Bundibugyo virus cases and 1,269 deaths, with 97 new cases and 62 deaths in the preceding 24 hours. Ituri remains the epicentre (2,595 cases, 1,077 deaths across 28 of 36 health zones), followed by North Kivu (275 cases, 172 deaths), Haut-Uele (27 cases), Tshopo (5), and South Kivu (3). Overall, 47 of 140 health zones are affected. Contact follow-up stands at 74.5%. Uganda reported 20 confirmed cases and two deaths, with no new case since 21 June and a 42-day countdown initiated after the last patient's discharge on 16 July. Exported cases include a US healthcare worker evacuated to Germany on 18 May (recovered, discharged from Charité), a US contact transferred to Czechia, a French doctor diagnosed on 24 June after returning from a humanitarian mission, a second US citizen evacuated to Germany on 13 July, and a UK resident isolated precautionarily in London on 21 July, signalling low but real international risk. The Oxford ChAdOx1 BDBV first-in-human trial began on 24 July.
Anaplasmosis, Canada
An increase in reported anaplasmosis cases has been noted in Ontario and Nova Scotia, Canada, as of July 2026. The rise in cases is occurring amid an expansion of ticks in these provinces.
Dengue, local transmission, France
Mainland France has reported its first two autochthonous dengue cases of the 2026 surveillance season. The locally acquired infections occurred in separate municipalities within the Tarn and Hérault departments of Occitanie. Both patients are clinically stable. Investigations and vector-control measures are underway, and while the widespread presence of Aedes albopictus makes further transmission possible, no additional infections have been reported.
Chikungunya, global updates
Chikungunya outbreaks are expanding across three regions. In Costa Rica, local transmission has spread beyond Playa Langosta into Guanacaste and Alajuela provinces, with 47 confirmed cases as of July 2026 and no severe outcomes; the US CDC issued a Level 2 travel notice. French Guiana is facing its first epidemic since 2015, reporting 1,157 confirmed cases and 210 hospitalizations by 16 July 2026, with ongoing coastal transmission despite a recent case decline. In the Philippines, Samar Province recorded 329 suspected cases (zero deaths) between February and July, concentrated in Basey and Gandara, peaking at 206 cases in week 26
Tick-borne encephalitis, Sweden
So far this year, Sweden has recorded a 54% increase in tick-borne disease cases, with 213 people infected. This rise is attributed to climate change, which has led to an earlier spring and favored tick proliferation. Over the past decade, the average annual increase in cases has been 6%.
First two autochthonous cases of the 2026 season reported in Tarn and Hérault.
Confirmed cases rise to 47 with local transmission in two provinces; no deaths reported.
1157 confirmed cases and 210 hospitalizations reported in the first epidemic since 2015.
329 suspected cases and zero deaths reported from February to July, peaking in June.
3174 cases and seven deaths reported across five states ahead of the seasonal peak
A 22% increase in cases has been reported, reaching 34 820 across 21 regions.
Approximately 4,000 cases and two to four deaths reported daily in Blue Nile State.
184 new cases and 14 deaths reported between weeks 20 and 27 across 13 regions.
113 cases reported between January and June, with 13 child deaths at one hospital.
1953 cases and two deaths reported in São Paulo State, exceeding the 2025 total.
Over 123,000 suspected measles cases and 13,098 dengue cases reported with multiple fatalities.
398 confirmed cases in the Pavlodar region during the first half of 2026
188 suspected cases and one death reported in Nsanje District, with links to Mozambique.
Four cases reported among unvaccinated adult males in Kent County, prompting an outbreak declaration.
54% increase in tick-borne disease cases this year, with 213 people infected.
Epidemic declared with over 3000 cases linked to fecal contamination of the water supply.
First laboratory-confirmed case in Lviv region with undetermined multi-country exposure history.
Increase in reported cases amid tick expansion in Ontario and Nova Scotia.
Multistate outbreak linked to imported iceberg lettuce with 1645 cases and over 5100 pending confirmation.
Community cluster in Upper East Side reaches 84 cases and five deaths; investigation ongoing.
Regional resurgence with over 500 human cases in Mexico and three deaths in Honduras
Third case this year reported in an adult from Lincoln County; 26 cases nationwide.
Three confirmed deaths reported in Anzoategui state; outbreak remains localized with no widespread risk.
Two girls from Rajasthan died in Gujarat after testing positive; border surveillance increased.
Sharp national surge linked to Eid ul-Adha livestock exposure in June 2026.
Second confirmed case of 2026 reported in a 22-year-old man from Quetta.
More than 1,700 cases reported in Landikotal over the last three months.
Confirmed human case in Khovd province linked to the consumption of marmot meat.
104 reported cases in Kota district, with urban areas accounting for 71 infections.
Borno State reports more than 35,500 suspected cases and 198 deaths, pressuring treatment facilities.
Renewed transmission surge across 23 states with 963 confirmed cases and 229 deaths.
Rising clade IIb cases in Western Australia and a second travel-related clade Ib case.
The ESCMID-AUMC Epi Alert, a strategic collaboration between the ESCMID Emerging Infections Subcommittee and the Center of Tropical Medicine and Travel Medicine of Amsterdam University Medical Center (AUMC) that integrates expertise and resources to advance emerging infectious diseases surveillance and intelligence sharing. This collaboration integrates ESCMID's extensive international network and emerging infections expertise with AUMC's proven surveillance capabilities, led by Dr. Abraham Goorhuis and the AUMC team and other collaborators form European Institutions.
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