[RobinL]

I'm not sure that is true. As I understand it, it's a cohort of people of that age who live in a geographical area of Israel where vaccination was started early. So it includes people of that age who declined the vaccine/didn't get it fr other reasons.

Of course, you're also correct that another important factor is that some of the cohort are not yet fully protected.

The definitions are here: https://www.medrxiv.org/content/10.1101/2021.02.08.21251325v...

Quote: In order to distill the possible effect of the vaccinations from other factors, including a third lockdown imposed in Israel on January 2021, we compared the time-dependent changes in number of COVID-19 cases and hospitalizations between (1) individuals aged 60 years and older, eligible to receive the vaccine earlier and younger individuals (0-59 years old); (2) early-vaccinated cities compared to late-vaccinated cities; (3) early-vaccinated geographical statistical areas (GSAs) compared to late-vaccinated GSAs;

[graeme]

Yeah I was wrong. I believe early and late refers to cities and the cohorts are taken from early or late cities.