Dec 10, 2025
Most ViewedH3N2 in Europe
Europe is seeing early, rising influenza activity dominated by A(H3N2) “subclade K” (formerly J.2.4.1), which accounted for about one-third of global A/H3N2 sequences May–Nov 2025 and “almost half” of...
GISAID
Virus genome database
Fact-Checks
5 resultsDec 13, 2025
Most ViewedWhat is the current H3N2 flu outbreak situation in Europe as of December 2025?
Europe is experiencing an early, H3N2-dominated 2025–26 influenza season driven largely by a drifted H3N2 “subclade K,” which accounts for about one‑third of global H3N2 sequences and almost half of H...
Jan 19, 2026
What data and access has China refused or limited for international COVID‑19 origin investigators, and how has the WHO responded?
China has repeatedly limited or delayed sharing key datasets and access that investigators say are essential to reconstructing the earliest days of the pandemic—most notably raw patient-level records ...
Jan 4, 2026
What were the overall vaccine effectiveness estimates for 2025–2026 influenza vaccines against A/H1N1, A/H3N2, B/Victoria, and B/Yamagata?
Available public reporting for the 2025–2026 influenza vaccines confirms that formal effectiveness analyses exist (notably interim Southern Hemisphere and early European primary-care studies) but the ...
Nov 21, 2025
What role does population-level vaccination coverage play in steering H3N2 evolutionary pathways?
Population-level vaccination coverage can alter which influenza viruses spread and how quickly they evolve by changing the pool of immune hosts, but recent reporting shows H3N2 is rapidly diversifying...