Its time you gave up pushing your weak strawman.The sub variants have virtually completely taken over in the UK, the Bi element in the bi variant was developed to tackle the original wuhu
you have ignored the whole sentence:
”bivalent vaccines were introduced in Sept 2022 which were designed to,prevent both original virus and Omicron variants BA4 and BA5”
Try debating honestly, it is less stressful for and you won’t keep digging holes.