As H5N1 infects over 70% of the state’s dairy herds, exposed farmworkers are left without PPE or mitigation training in their native language. And some aren’t informed of an outbreak at all.

Using a commercially available H5 serology assay, we identified a 7.4% (n=5/68) anti-H5 seroreactivity rate among hunters in Northern Canada. All participants reported close contact with wild birds. ...

The multinational outbreak of Andes hantavirus (ANDV) linked to cruise ship travel should prompt the World Health Organization (WHO) to change its default response to the risk of airborne transmission of the virus. Hantavirus is a pathogen with documented person-to-person transmission and high case fatality. Therefore, the starting point should not be to downplay the risk of airborne transmission until it is definitively proven. The starting point should be the immediate adoption of precautionary measures to reduce airborne transmission, such as respirator use by healthcare workers, cases, and close contacts; ventilation optimisation; avoidance of unfiltered air recirculation; and portable HEPA (high efficiency particulate air) filtration in all enclosed quarantine and transport settings. On 8 May 2026, WHO issued several documents that point in different directions. A Disease Outbreak News report acknowledged possible person-to-person transmission, but largely framed precautions around droplet and contact transmission outside aerosol generating procedures.1 By contrast, WHO’s guidance for managing contacts of Andes virus cases and disembarkation from the cruise ship adopted much more precautionary measures, including quarantine, universal respirator use during disembarkation, respirators for healthcare workers …

Posted on behalf of the Swiss National Reference Center for Emerging Viral Infections, Geneva University Hospitals and the Institute of Medical Virology, University of Zurich (Partner Laboratory Natio...

Hantaviruses are the etiological agent of hemorrhagic fever with renal syndrome (HFRS) and hantavirus cardiopulmonary syndrome (HCPS). The latter is associated with case fatality rates ranging from 30...

The cruise operator said in a statement that the ship may sail from Cape Verde to Las Palmas or Tenerife in the Canary Islands and dock there.

A human case of avian influenza A(H9N2) infection in a returning traveller from a non-European country where the virus has previously been identified in birds, has been reported in the Lombardy region...

As H5N1 infects over 70% of the state’s dairy herds, exposed farmworkers are left without PPE or mitigation training in their native language. And some aren’t informed of an outbreak at all.

Highly pathogenic avian influenza viruses (HPAIVs) derive from H5 and H7 low pathogenic avian influenza viruses (LPAIVs). Although insertion of a furin-cleavable multibasic cleavage site (MBCS) in the...

After H5N1 bird flu was detected in elephant seals gathered at Ano Nuevo State Park, other marine mammals have also succumbed, including a sea otter and sea lion. So far, only animals in San Mateo County have been affected.

Using a phylogenetic framework to characterize natural selection, we investigate the hypothesis that zoonotic viruses require adaptation prior to zoon…

Seven weaned elephant seal pups in California’s Año Nuevo State Park tested positive for highly pathogenic avian influenza (HPAI) H5N1, the U.S. Department of Agriculture’s National Veterinary Service...

Seven elephant seal pups at a state park in the Bay Area have tested positive for highly pathogenic H5N1 bird flu, marking the first confirmed cases in marine mammals in California.

Researchers at UC Davis say news they've dreaded since 2023 has come to pass: California's elephant seals have been infected with H5N1 bird flu.