Ian M. Mackay, PhD (he/him) 🦠🤧🧬📑🦟🧀

Of those around, most flu viruses are A(H3N2), with some B and A(H1N1) (hospital data). A reminder that last year finished with A(H3N2) subclade K wrapping up 2025 and driving a big & unusual summer surge into this year. Heaps of immunity.