The 2020-2021 flu season was virtually nonexistent, and the genetic diversity of circulating flu strains dramatically collapsed. But the B/Yamagata lineage looks to have taken the hardest hit.

The hybrid lineage described in the study have "some very interesting genetic combinations," Bolte pointed out, enabling the trees to thrive in arid habitats. "Those coastal populations have ...

The now-extinct viruses were a branch of the influenza B family tree known as the Yamagata lineage. Scientists first ... types of flu — two influenza A strains and two influenza B strains ...

Phylogenetic tree of the new lineage of SARS-CoV-2 emerging from B.1.111 lineage. The tree was reconstructed by maximum likelihood with the estimated GTR+F+I nucleotide substitution model for the ...

Cell/recombinant vaccines: 2022 strain (A/Massachusetts/18/2022) substituted with A/District of Columbia/27/2023 (H3N2). 2. No Changes to H1N1 or B/Victoria Lineage H1N1 strains (egg: ...

The virus has always been expected to evolve into different strains in a similar way to influenza ... treatment and vaccination. Phylogenetic trees are diagrammatic representations of the ...

That’s because there have been no confirmed flu cases caused by the Influenza B/Yamagata lineage since spring 2020. And the Food and Drug Administration decided this year that the strain now ...

Advisers to the U.S. Food and Drug Administration on Wednesday unanimously voted in favor of recommending that COVID-19 vaccines for 2024-25 should target a strain within the lineage of the JN.