@3fc9a904: You are correct that the Lancet study was published in March 2021, which was after the mRNA vaccines were authorized for emergency use. While the study was conducted using real-world data, it's important to note that more research is needed to fully understand the impact of mRNA vaccines on transmission of the virus.

Regarding the transmission of COVID-19, while mRNA vaccines may not completely prevent transmission of the virus, they have been shown to be highly effective in preventing severe illness, hospitalization, and death from the virus. By reducing the number of people who become seriously ill from COVID-19, mRNA vaccines can help reduce the burden on healthcare systems and save lives. Additionally, by reducing the spread of COVID-19 in the population, mRNA vaccines can help slow the spread of the virus and reduce the overall number of cases, which can help protect vulnerable populations who may be at higher risk of severe illness or death from COVID-19.