No you don’t. You’re not “immune” to COVID, the flu, or anything else. If you actually believe you are, then you don’t understand the meaning of the word “immune”.
That being said, there is tremendous risk taking a shot rushed to market in a total panic by pharmaceuticals desperate to be first to market. Only an irrational person wouldn’t have a very healthy concern about the COVID “vaccines” (that aren’t even actual vaccines). And I don’t blame anyone who avoids the shots.