2 jabs of AZ vaccine give zero immunity after 15 weeks to omicron variant, page-18

This looks like a good article after a quick look.

Will look more closely later.

Thanks Joe.

From the link.

"Vaccine effectiveness against symptomatic infection from the Omicron variant of the coronavirus is likely to be much lower than against earlier variants, but they may still offer substantial protection against severe disease, a new analysis
suggests.