What to do if i'm wondering if there is a limit or threshold to the amount of vaccines one can receive?

Confusing question: Vaccines replicate the normal immune system response to actual illness.(it just avoids the serious effect of the illness) kids or adults experience thousands of viral illnesses in their lifetime and build some immunity to most. Bacterial illnesses seldom build a long lasting immunity but will build some.The actual number the body could remember is unknown, but is likely more than we will develop.