Really we need 200 Vaccination doses per 100 people. And long term, maybe more than that.
Herd immunity kicks in somewhere less than 100% vaccinated (should start seeing some numbers coming out of Israel in the next few months). A sizeable percentage of the population has had Covid already and therefore has some level of natural immunity (not full, but better than nothing). Furthermore, kids have been shown to spread it less (and we're not vaccinating them currently, reducing the population 20-25%). So al…
Yes, but 1 adult "100% vaccinated" takes 2 doses of any of the current vaccines.
if 75% of the population of a country are "adults who can be vaccinated", and the rest are e.g. under 16, or the few adults will have medical issues that prevent vaccination; then you're shooting for 1.5 vaccines per person, i.e. 150%.
And the longer term goal is also to vaccinate children as young as 6. Trials are already underway: https://www.nihr.ac.uk/news/first-childrens-covid-19-vaccine...
And this might actually be necessary for full Herd immunity (if it starts at 80% or 85% fully vaccinated).