“The updated shots, which target an Omicron subvariant named XBB.1.5”
Which is already overtaken by other mutations and headed for obscurity
“CDC estimates show XBB.1.5 is responsible for about 3 percent of current cases, while a soup of other newer Omicron variants dominates, led by EG.5 at about 20 percent.”
It’s like taking last year’s flu vaccine, but with juicier adverse effects.