This article talks about a study from Stanford, which looks at how SARS-CoV-2 enters the tissue. Talking about the study, one of its authors said, "Our upper airways are the launchpad not only for infection of our lungs but for transmission to others." It is important to understand the pathways viruses take so people can properly defend their bodies.

Goldman, B. (2023, January 5). Stanford Medicine scientists pinpoint COVID-19 virus's entry and exit Ports inside our noses. Stanford Medicine News Center.