Just found this: https://www.pbs.org/newshour/health/scientists-debate-potential-benefits-of-intranasal-covid-19-vaccines https://www.pbs.org/newshour/health/s

Just found this: https://www.pbs.org/newshour/health/scientists-debate-potential-benefits-of-intranasal-covid-19-vaccines https://www.pbs.org/newshour/health/scientists-debate-potent... It leads with this: > Vaccines that are injected into arm muscles aren’t likely to be able to protect our nasal passages from marauding SARS-CoV-2 viruses for very long It might be true, but I would have liked to read more. It's pretty easy to envision a case where that's not true, and the immune system doesn't really care where the vaccine was given.