Many studies identified an increase in the incidence of type 1 diabetes mellitus (T1DM) during the COVID-19 pandemic, but other reports do not support this association. This Review addresses the issue of the involvement of SARS-CoV-2 infection in the development of T1DM using evidence from epidemiological, clinical and experimental studies.
Thanks for asking. I was using incorrect terminology. It’s the Influenza B/Yamagata lineage which has probably gone extinct. According to this paper in The Lancet : https://www.thelancet.com/journals/lanmic/article/PIIS2666-5247(24)00066-1/fulltext
The B/Victoria lineage persists. B/Yamagata has not been confirmed since March 2020 according to this paper : https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9524051/
This paper from Nature goes into it a bit more, in particular wrt implications for vaccines: https://www.nature.com/articles/s41579-021-00642-4
Sweet, good followup. I was only aware of Yamagata