Started around April. For example (random Google search): https://www.google.co.il/amp/s/www.makorrishon.co.il/news/338713/amp/ https://www.google.co.il/amp/s

Started around April. For example (random Google search): https://www.google.co.il/amp/s/www.makorrishon.co.il/news/338713/amp/ https://www.google.co.il/amp/s/www.makorrishon.co.il/news/33... Vaccinated passengers coming from countries with the Delta variant asked to get tested again 72 hours after arrival. Since then fully vaccinated were asked to get tested on multiple occasions during contact tracing when encountering the Delta variant. To quote Prof. Ran Balicer (co-author of the 95% efficacy NEJM paper): https://www.haaretz.co.il/health/corona/.premium-1.9971759 https://www.haaretz.co.il/health/corona/.premium-1.9971759 > It is very difficult to estimate vaccine efficacy because coronavirus testing is done selectively.