Hacker News Reader

Wrong. The study cited in [47] clearly talks about the therapies from AstraZeneca/Oxford, Moderna and Pfizer/BioNTech

Oh boy... sorry man, don't have the time to continue this.

47 in link above is a study of the cruise ship, not what you think.

If you meant the actual link above, it clearly states vaccines give immunity but it might be waning, i.e: won't last, same as natural immunity

Best of luck, thought I might help with your logic, but I admit defeat there.