It may change how seriously some patients (me) giddy up and go with treatment, diet, stress reduction etc...It's also of no use for an active patient, it changes nothing. All a doctor could say is that patients with certain genetic variants might have a worse or more gentle disease course, it would do nothing but scare a patient and it would be inaccurate most of the time.
Ha... unless we’re all suppressing our immune systems....Why caucasians have those mutations and not other races is related to the past. Those mutations probably protect us from Yersinia pestis, responsible for the plague in Europe.
So...if the plague comes back...we'll all by standing and everyone else will be toast, comforting.