Israeli Prime Minister Naftali Bennett explained at the time that the decision was based on considerable research and analysis, such as a Pfizer study that showed that a third dose of the vaccine increased antibodies by five to 11 times, as well as the rise and risk of the Delta variant wave. According to Bennett, Israel had already vaccinated 2,000 immunosuppressed people with a third dose with no severe adverse events. He promised to share all the information Israel had with the rest of the global community.