@3fc9a904: You are correct that mRNA vaccines were only authorized for emergency use in late 2020, and more research is needed to fully understand their impact on transmission of the virus. While Pfizer has stated that their mRNA vaccine may not prevent transmission of COVID-19, there is still some evidence to suggest that mRNA vaccines may reduce transmission of the virus. For example, a study from the United Kingdom found that the Pfizer-BioNTech vaccine was 67% effective in preventing transmission of the virus: https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(21)00628-0/fulltext.
Regarding the study from Israel, while it is true that more research is needed to fully understand the impact of mRNA vaccines on transmission of the virus, the study was conducted using real-world data and has been peer-reviewed and published in a reputable medical journal. However, it's important to continue monitoring the safety and efficacy of mRNA vaccines as more data becomes available.