If you enjoy naturally acquired immunity, there isn’t even any need to care about your Ab titer at all. You may get some mild symptoms if you happen to get infected while your Ab titer is low but, as soon as your immune memory gets the wake-up call, it’ll provide you with very potent antibodies that can deal more effectively with all of the variants – even at relatively low concentration – than vaccinal anti-S Abs do.
— Read on www.geertvandenbossche.org/post/repetitio-est-mater-studiorum