This is because you have had it before therefore your body knows how to get rid of it,you have also become more amuned to it. we are able to get rid of a certain illness sickness or even pathogen faster the second time you get it due to the fact our bodies have had it before which mean they have experienced how to get rid of it
I would say it is most likely skills or information. It can be broadly interpreted in it's contest. It mostly likely co-insides with your required reading terms. I encourage you to use your best judgement.
