From March this year:
Five reasons why COVID herd immunity is probably impossible Quote:It’s unclear whether vaccines prevent transmission
We've since found out they don't - they just keep you from ending up in hospital in the majority of cases.
Quote:Vaccine roll-out is uneven
Yes, and its still uneven.
Quote:New variants change the herd-immunity equation
Yes, especially since the appearance of Delta and now Omicron (not sure what happened to Lambda and Mu?).
Quote:Immunity might not last forever
Yes, we've since found out that 'boosters' are needed.
Quote:Vaccines might change human behaviour
Yes again... a lot of people believe the vaccines are some sort of 'silver bullet' which make Covid disappear... and governments are also pushing this idea because money and the economy is more important that peoples' lives as far as they are concerned. See NSW, South Australia, Victoria and, coming up - Queensland and Tasmania. With Scotty from Marketing 'cheering them on', of course.
Quote:Even without herd immunity, the ability to vaccinate vulnerable people seems to be reducing hospitalizations and deaths from COVID-19. The disease might not disappear any time soon, but its prominence is likely to wane.
Let's hope so.