[mlyle]

It's still not any kind of "inflection point". The difference between 0 and 5% is an even sharper slope-- from infinity to 1200% of the population ;)

Also-- all we know about is effects on symptomatic illness and we can't be sure there's any large transmission benefit (and if there is, it's probably smaller than the efficacy against symptomatic illness).

If the virus is still circulating in volume, the difference between a 95% effective vaccine and a 70% vaccine is a further 6x reduction in risk for the individuals that have it. Every little bit helps, but a really high efficacy is very nice to have.