Virology

Pathogens Virus Transmission Virus Variants Influenza Viruses Zoonotic Diseases Virus Mutation Infectious Diseases Viral Infections Epidemiology Coronaviruses

California Monitors ‘Cicada’ COVID Variant Detected at Low Levels in Wastewater

Low vaccination among seniors leaves the state vulnerable to a possible summer rise.

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Maricopa County Confirms Measles Case, Identifies Three Queen Creek Exposure Sites

‘Cicada’ COVID Variant Spreads Globally as Officials Track Its Rise

Heavily Mutated ‘Cicada’ COVID Variant Spreads Globally, Reaches at Least 25 U.S. States

CDC Tracks BA.3.2 COVID Variant With Heavy Spike Mutations as U.S. Detections Expand

Germany’s Flu Wave Recedes After Peak, With RSV Still Circulating

Japan Confirms H5N1 Outbreak at Hokkaido Poultry Farm, Orders Culling of 190,000 Chickens

Santa Fe to Start Influenza Vaccination March 10 as Pharmacies Offer Private Doses

Argentina Brings Forward 2026 Flu Campaign as First Doses Roll Out Nationwide

Ceará Confirms Three Cases of H3N2 Subclade K in Fortaleza Area

Wisconsin Confirms First 2026 H5N1 Case in Jefferson County Poultry Flock

Spain Notifies WHO of Suspected Person-to-Person A(H1N1)v Case in Catalonia

Catalonia Confirms Human H1N1 Swine Flu Case in Lleida

Netherlands Declares Influenza Epidemic as H3N2 Becomes Dominant

Study Finds West Nile Virus Now Established in Austria After Record 2024 Cases

H5N1 Bird Flu Confirmed in Chennai Crows as Tamil Nadu Orders Statewide Vigilance

Experts Warn Orthopoxviruses Could Exploit Post-Smallpox Immunity Gap

Pakistan Declares Airport Emergency as Asia Tightens Checks After Contained Nipah Cluster in India

WHO Rates Nipah Spread Risk Low After Two Cases in India

WHO Says Risk of Nipah Spread Is Low as India Contains Two-Case Cluster