Immunity has many levels Old Guy
Having immunity can be
1. Limited immunity (provides some protection)
2. Moderate immunity (provides a lot of protection)
3. Full Immunity (Provides complete protection)
Again, you have to get your head out of this all or nothing thinking. Vaccines are not defoined as All or nothing immuniyt... Hence the FLu vaccine. I hate to be a broken record, but that's some thing that you invented in your mind ...
In fact, you keep touting that a vaccine should be "Complete immunity" - can you please reference an article about how a vaccine is defined as "complete immunity" so that we are on the same page?
Also, if it's been a long time since someone get two doses, or there is a different strain going around (similar to how we have different flu strains), there will be diminished, limited, or low immunity
Moderate immunity I would "personally define" as preventing severe illness. It doest prvent you from becoming symptomatic, but it prevents severe illness.
There are differnet levels of immunity
The numbers are clear as day though - 99.5% of patients in the hospital with covid are unvaccinated
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