The Aus and NZ approach worked well to keep pressure off the health system until enough were vaccinated. Data seems to show those that had 3rd shot pfizer have very low risk of hospitalization compared with unvaxxed. The 3rd shot (booster) really makes a difference, something I myself was quite skeptical about early on. I had initially thought if the 2nd doesn't work then the third is probably placebo but glad to be proven wrong.