 In this study, researchers found that mRNA vaccines can induce both serum and salivary antibodies against the SARS-CoV-2 spike protein and its receptor binding domain. The presence of these antibodies in saliva suggests that they could play a role in blocking virus transmission to the oral cavity. This finding could provide important insights into how mRNA vaccines work to protect against SARS-CoV-2 infection. This article was authored by Thomas J. Kitas, Devadas Chaturbuj, Victor M. Cruz Portillo, and others.