Nature, Published online: 06 October 2026; doi:10.1038/d41586-026-03150-8Cases in the Northern Hemisphere are cropping up weeks early, and they are dominated by a virus with a concerning mutation.
The medics can review the annual flu vaccine, all because of information that the season in the Northern Hemisphere might have started earlier than usual. It is reported that the percentage of positive tests for this time is unusually high, the flu outbreaks have been observed in the UK, the United States and Japan. Read further...