" You want to change and remove a trait not start spreading it.... "

why not? if that may help so be it :)

if the inflicted cannot find cure to their ownselves
sickness, maybe by spreading it among others will cause these new inflicted to act differently, that may hopefully, find the proper cure. :)

see what's happening with AIDS?

it started elsewhere, and got spread out far and wide. and now what is happening? every scientists involve worldwide is fighting against time to develop the proper cure.