The Ebola virus disease outbreak in the Democratic Republic of the Congo has reached 3,553 confirmed cases and 1,558 deaths across 49 health zones in five provinces, the fastest-growing outbreak in recorded history, with Ituri accounting for 87.9% of cases. West Nile virus transmission has been identified in 49 areas across seven European countries, with Greece reporting 42 cases and four deaths, while the United States reports 113 cases from 23 states, 61 of them in Arizona. Chile has declared its first national Hantavirus Health Alert after 41 cases and 14 deaths from Andes virus. São Paulo state reports a 94.7% case-fatality rate for Brazilian spotted fever, with 18 deaths among 19 confirmed cases. Cholera in Cameroon's Far North region has caused 754 cases and 25 deaths, severely affecting the Minawao refugee camp. Meanwhile, Cambodia reports a 58% surge in dengue cases, and Taiwan has recorded ten Japanese encephalitis cases, including one death.
Ebola virus disease — Global
The CDC reports 3,553 confirmed cases and 1,558 deaths across 49 health zones in five provinces. In the past 24 hours, 69 new confirmed cases and 34 deaths were recorded. The event is the fastest-growing Ebola outbreak in recorded history, reaching 1,000 deaths in just over two months. Ituri remains the epicenter, accounting for 87.9% of cumulative cases.
West Nile virus disease — Global
As at 29 July, 49 areas with WNV transmission have been identified across seven European countries: Italy (30), Greece (8), Romania (4), North Macedonia (2), Spain (2), France (2) and Germany (1). Greece reports an early and intense season with 42 cases, 37 of them neuroinvasive, and four deaths, concentrated in Attica. In the United States, 113 cases have been reported from 23 states through 28 July, with Arizona accounting for 61, a 62.5% increase over the same period of 2025.
Hantavirus disease — Central & South America
Chile has declared its first-ever national Hantavirus Health Alert following a doubling of the case fatality rate in 2026. 41 cases and 14 deaths from Andes virus have been reported. Recent infections include two occupational cases among aquaculture divers in the Aysén Region, a fatal pediatric case in the Valparaíso Region, and cases linked to outdoor activities in the Los Lagos Region.
Rocky Mountain spotted fever — Central & South America
The São Paulo State Health Secretariat has recorded 19 confirmed cases and 18 deaths from Brazilian spotted fever this year, representing a 94.7% case-fatality rate. In 2025, the state confirmed 61 cases and 44 deaths. The acute febrile disease is caused by Rickettsia rickettsii.
Cholera — Africa
The Far North region of Cameroon has reported 754 cases and 25 deaths, including at least 24 cases in the Minawao refugee camp, which is operating at 325 percent of capacity and where multiple chains of transmission are suspected. Between 22 June and 27 July 2026, 8 247 new cases and 326 new deaths were reported worldwide, with the Democratic Republic of the Congo (3 841), Sudan (1 502), Somalia (962) accounting for most cases, and Sudan (153), DRC (105), Central African Republic (36) for most deaths. Cumulative figures since 1 January 2026 stand at 132 313 cases and 1 556 deaths globally.
Outbreak is now the second-largest Ebola outbreak on record (3553 cases and 1558 deaths)
17 confirmed autochthonous cases year-to-date, linked to armadillo exposure.
First-ever national health alert declared amid doubling CFR and 41 reported cases.
19 confirmed cases and 18 deaths reported this year in São Paulo
DENV-2 epidemic surpasses 84.000 cases, with July recording 29.350 cases.
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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