This ain't your daddy's head cold. If you can wade through the text, the coolest thing this study shows is an actual picture with an electron microscope, of the theorized nanotubes which covid uses to replicate and transmit in immune cells bypassing innate immunity responses. Fwiw....these are some of the world's best HIV scientists who did this study, and they used tools and techniques learned from decades of HIV research, like staining the SARS proteins and the nucleus.