China´s Scientists Make Breakthrough on How H5N1 Influenza Occurred in the U.S.    
submitted by kickingbird at Jul, 9, 2025 from CASAD
Chinese scientists have found out how the H5N1 virus initially invades the mammary glands of dairy cattle and may have triggered the outbreak of H5N1 avian influenza across over 1,000 dairy farms in the ...

Canada: Highly pathogenic avian influenza in Saskatchewan, November 14, 2025    
submitted by kickingbird at 24 hours ago from Canadian Food Inspection Agency
The Canadian Food Inspection Agency (CFIA) has confirmed highly pathogenic avian influenza in the Rural municipality of Fish Creek No. 402, Saskatchewan, in non-commercial poultry.The CFIA has advised ...

UK: Bird flu (avian influenza): latest situation in England    
submitted by kickingbird at 24 hours ago from GOV.UK
15 November 2025 Highly pathogenic avian influenza (HPAI) H5N1 was confirmed in a small group of ornamental captive birds near Dawlish, Teignbridge, Devon (AIV 2025/101) on 15 November 2025.A 3km Captive ...

US: H5N5 Avian influenza confirmed in Grays Harbor County resident    
submitted by kickingbird at 2 days ago from the Washington State Health Department
A Grays Harbor resident who was hospitalized with influenza symptoms in early November has been confirmed to have influenza A H5, a type of avian influenza (bird flu). Additional testing shows the virus ...

UK: Bird flu (avian influenza): latest situation    
submitted by kickingbird at 2 days ago from GOV.UK
14 November 2025 Highly pathogenic avian influenza (HPAI) H5N1 was confirmed in a small backyard flock of captive birds near Pontyberem, Carmarthenshire, Wales (AIV 2025/100) on 14 November 2025.A 3km ...

Zheng H, Chen Y, Gao R, Yang W, Lu X, Chen Y, Gu M. NA-N322S and G389D mutations synergize with PB2-627K to enhance H7N9 pathogenicity in mammals. Vet Microbiol. 2025 Oct 30;312:11077.  Abstract  
submitted by kickingbird at 10 hours ago from Vet Microbiol. 2025 Oct 30;312:11077
The H7N9 subtype avian influenza virus (AIV) is currently the subtype with the highest number of human infection cases, with a mortality rate of nearly 40 %,40 %, posing a serious threat to public health. ...

Entriken CG, Bruce KL, Coyne BM, Kruyer SH, Sincla. Improved efficacy of an influenza DNA vaccine through high-density microarray patch delivery. J Gen Virol. 2025 Nov;106(11):002179.  Abstract  
submitted by kickingbird at 10 hours ago from J Gen Virol. 2025 Nov;106(11):002179
Pandemic preparedness requires vaccine platforms that are fast to produce, thermostable and suitable for broad deployment. DNA vaccines are well suited to this task but have historically suffered from ...

Sullivan J, Poulson R, Olsen GH, Berlin AM, Cao Z,. Rapid increase in antibodies to influenza A virus H5 and N1 in lesser scaup (Aythya Affinis) following the introduction of 2.3.4.4b H5N1 into north America. Can J Microbiol. 2025 Nov 13.  Abstract  
submitted by kickingbird at 10 hours ago from Can J Microbiol. 2025 Nov 13
Clade 2.3.4.4b Eurasian-origin H5N1 entered North America in late 2021 and spread across the continent. While studies have characterized the antibody response mounted by dabbling ducks following exposure, ...

Freja CM Kirsebom, etc.,al. [Preprint]Early influenza virus characterisation and vaccine effectiveness in England in autumn 2025. UK Health Security Agency.  Abstract  
submitted by kickingbird at 11 hours ago from UK Health Security Agency
New data published today by the UK Health Security Agency (UKHSA) shows the 2025/26 vaccine is currently 70 to 75% effective at preventing hospital attendance in children aged 2 to 17 years and 30 to 40% ...

Hunter Joseph Ries, etc.,al. [preprint]Weak selection and stochastic processes limit the emergence of antigenic variants during household transmission of influenza A viruses. https://doi.org/10.1101/2025.11.04.686470.  Abstract  
submitted by kickingbird at 23 hours ago from https://doi.org/10.1101/2025.11.04.686470
Influenza viruses undergo antigenic drift, the gradual accumulation of mutations that cause antigenic changes in the viral surface proteins hemagglutinin (HA) and neuraminidase (NA). Although selection ...