Thanks to Marianna and DW. This would have been a better answer to the question I messed up:
Two-dose Pfizer-BioNTech vaccination provides some protection against symptomatic infection with omicron, but significant protection against hospitalisation (South Africa data)
33% protection against infection with omicron, relative to the unvaccinated
(down from 80% protection against infection with delta)
70% protection against hospital admission in omicron infection, relative to the unvaccinated
(down from 93% protection with delta)
