Most of what people know about RNA viruses comes from the ones that make them sick, such as the flu, dengue, Zika, and the virus behind COVID-19. By examining everything from subway handrails to city sewage and soil, researchers discovered just how much viral diversity has gone unnoticed. Of nearly 55,000 RNA viruses an international team found in and around 102 cities, most had never been recorded before. Cities, in other words, carry a far wider mix than scientists had cataloged. Why so many went unnoticed Antônio Pedro Camargo, a professor in the Department of Biochemistry at the University of São Paulo’s Institute of Chemistry, is one of the study’s authors. He’s also a member of the Biology of Bacteria and Bacteriophages Research Center, which studies bacteria and bacteriophages, the viruses that infect bacteria. “We were familiar with several disease-causing viruses, but we greatly underestimated viral diversity in nature,” Camargo said. “When you search for a virus based on a disease, there’s already a bias because all viruses that don’t cause disease end up being ignored.” “Once we’re able to analyze what’s present in a sample without that bias, we gain a broader view of viral diversity,” he added. The...

Florida reported 72 new locally acquired cases of dengue fever in one week, according to the latest update from the Florida Department of Health. The disease is also called breakbone fever, due to the pain it causes.

386 reported cases in records dated 14 Sep – 13 Oct 2026, versus 188 in 15 Aug – 13 Sep 2026 (105.3% higher). A wider record window, 16 Jul – 13 Oct 2026, holds 632 reported cases. Reporting coverage varies; this compares recorded counts and does not establish a rise in incidence. Record dates are source-record dates, not illness-onset dates, and a missing report does not mean zero cases.

A nursing student's death from malaria at Mumbai's JJ Hospital, with two resident doctors in ICU with dengue, has raised vector-borne disease alarms.

Dengue is an acute disease caused by infection with any one of four dengue viruses (DENV-1 to DENV-4), all of which belong to the genus Orthoflavivirus. Although conventionally referred to as one DENV with four serotypes, DENV-1 to DENV-4 are genetically different1, with DENV-4 being associated with milder disease and having caused fewer outbreaks than DENV-1, DENV-2 and DENV-3 (ref. 2). All four DENVs are transmitted by Aedes mosquitoes, such as Aedes aegypti and Aedes albopictus, which are both widely distributed, and Aedes polynesiensis in the South Pacific. A. aegypti is well adapted to thrive in the urban environment, breeding in man-made water-containing receptacles, such as disused pails and flowerpots1; it is anthropophilic, feeding exclusively on human blood. Consequently, explosive dengue epidemics are mostly associated with A. aegypti-associated DENV transmission. The expected global growth in the number of cities with high human population densities coupled with climate change could thus expand habitats favourable for A. aegypti to thrive3. Indeed, dengue outbreaks are now occurring with increased frequencies in the summer months in southern Europe, the southern USA and northern Argentina1. DENV infection results in a range of outcomes, from asymptomatic infection and self-limiting mild febrile illness that cannot be differentiated...

The H5N1 case is in a resident of Yakima County, Washington, who was exposed to infected dairy cows.

Pesquisa analisou mais de 40 mil internações em UTIs brasileiras entre 2015 e 2024 e aponta maior risco entre idosos e pacientes que precisam de medicamentos para elevar a pressão arterial

The tiger mosquito (Aedes albopictus), a species capable of transmitting viruses such as dengue, Zika, chikungunya and yellow fever, is spreading throughout

This PrimeView highlights the epidemiology of dengue virus infection, and summarizes the pathophysiology, diagnosis, prevention and management of this disease. It accompanies the Primer on this topic by Ooi et al.

Akustischer Lockruf fängt bei Campusversuch 49 Aedes-Mücken Eine an der Universität Dhaka entwickelte Mückenfalle fing bei einem Außentest 49 Aedes-Mücken. Eine ähnliche Falle ohne Ton fing dagegen nur eine, wie das universitäre Forschungslabor hinter dem Projekt mitteilte. Das Gerät MAST-CloudNet…

Isca sonora captura 49 mosquitos Aedes em teste no campus Uma armadilha para mosquitos desenvolvida na Universidade de Dhaka capturou 49 mosquitos Aedes durante um teste ao ar livre, em comparação com um capturado por uma armadilha semelhante que funcionava…

Un señuelo sonoro captura 49 mosquitos Aedes en una prueba en el campus Una trampa para mosquitos desarrollada en la Universidad de Daca capturó 49 mosquitos Aedes durante una prueba al aire libre, frente a uno capturado por una trampa…

A sound lure catches 49 Aedes mosquitoes in campus trial A mosquito trap developed at Dhaka University captured 49 Aedes mosquitoes during an outdoor trial, compared with one caught by a similar trap operating without sound, according to the university…