Conditioned through the flu shot. Mental stability and know-how is formed/developed through experience.
Receiving the flu vaccination, they inject some of the virus into your blood to get the antibodies used to it. The antibodies get good at fighting the particular flu from experience; they get used to dealing with it because of experience.
As you expose yourself to something, you condition yourself how to go about it/ how to deal with it. Dealing with it, you'll gain experience, know how, wisdom.
