The Difference Between the Covid and Flu Vaccines

Vaccines for these two very different viruses have common characteristics they elicit incomplete and short-lived protection against evolving virus variants that escape population immunity. The limitations of influenza and SARS-CoV-2 vaccines remind us that candidate vaccines for most other respiratory viruses have to date been insufficiently protective for consideration of licensure i mean what the heck am i reading so now let's go to the last line here he says this it is not surprising that none of the predominantly mucosal respiratory viruses have ever been effectively controlled by vaccines. If natural mucosal respiratory virus infections do not elicit complete and long-term protective immunity against reinfection how can we expect vaccines especially systemically administered non-repl