Well, when the mandates were implemented there was a strong resurgence of the delta variant and the vaccines were very effective, even though there were the beginnings of some waning immunity. Even two doses are effective against infection and, of course, serious outcomes.
Omicron is a game-changer, in that you really need to increase the number of doses of vaccine. Three doses would boost your immunity against infection, and definitely for serious outcomes, so these things need to be considered. Given the reduced vaccine effectiveness against the omicron variant, even with three doses, vaccines alone cannot prevent full transmission, so a layered approach has to be considered, including layering mask-wearing, for instance, but these are the things that the relevant ministers need to consider on the path forward.