Some good news out of the UK regarding lasting protection against hospitalization. For Pfizer, it seems like protection is holding up quite well over time, and given that the UK went with the longer interval as well this should probably hold true for Canada.
Unfortunately, AstraZeneca is seeing a bigger drop off (though the confidence intervals are wide), which makes their talk of not needing boosters a bit puzzling.
https://assets.publishing.service.go...al_disease.pdf