Is it appropriate to compare this 84% figure against vaccine efficacy? If so, it’s quite amazing that artificial vaccines can be more effective at providing immunity than infection with the actual pathogen.
Yeah totally exactly the same 9.9
To wit: tetanus and covid vaccines both generate stronger immune responses than the virus they are designed to fight, and for very similar reasons. Do you actually disagree with that statement?
Anyway, it's a myth that you can't develop antibodies to tetanus/tetanus toxin naturally. Lots of studies have found otherwise, finding tetanus antibodies in both humans and animals that haven't been vaccinated: https://pubmed.ncbi.nlm.nih.gov/1092755/
It's just not a very relevant fact, as tetanus is deadly, and the tetanus vaccine is cheap and works well. In fact, there's evidence the vaccine works even better than we thought, and booster shots may not be needed: https://academic.oup.com/cid/article/72/2/285/5741633
It's the other way around
> The findings of the authors suggest that infection and the development of an antibody response provides protection similar to or even better than currently used SARS-CoV-2 vaccines.