>On the other hand, it is generally thought that vaccines can trigger immune reactions that are often much stronger and longer lasting than just being infected,

>On the other hand, it is generally thought that vaccines can trigger immune reactions that are often much stronger and longer lasting than just being infected, so you would expect there to be a benefit to getting vaccinated even if you already had it. Interestingly the opposite is true for influenza: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2870374/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2870374/