There appears to be some confusion over the bivalent ‘vaccines’ which are now authorised for use in the UK and the US. The FDA in the US has authorised Pfizer’s updated Covid ‘vaccine’ based on the Ba.4/Ba.5 spike protein and it has not been trialled on humans, just 8 mice, as Igor Chudov explains
Thanks for this, a useful summary for those undecided. Shared on twitter.