A look at case rates of vaccinated and unvaccinated Israel airport arrivals
Green Pass and COVID-19 Vaccine Booster Shots in Israel – A More ‘Realistic’ Empirical Assessment Analyzing the National Airport Data
This study from November 2021 looked at the covid-19 positivity rates of arrivals at the Israel national airport.
The goal was to get an idea of the effectiveness at preventing infections of their Green Pass vaccine passport, and double vaccinations and boosters.
The findings seem to cast doubt on the approach of using boosters and covid passports to cut infections and reduce risk.
Israel national airport is a unique setting, where the Vaccinated and Unvaccinated individuals all have to test, which allows a more objective assessment of both the booster and Green Pass efficacy in preventing infections.
The analysis suggests that the positivity rate (number of cases divided by number of tests) among the Vaccinated cohort throughout August-October is only 1.54-fold smaller than the one among the Unvaccinated cohort (about 35% relative protection). More specifically, compared to the Unvaccinated group, the Vaccinated group has a significantly higher positivity rate during the month of August, then in September it shows a 3.45-fold smaller positivity rate (71% relative protection), and this protection decreases to 2.66-fold (62% protection) during October.
This also implies that the absolute number of infected individuals in the Vaccinated group is likely to be at least as high as in the Unvaccinated, raising serious concerns that the new Green Pass is inefficient in preventing infection spread, and could expose high risk individuals to risk.