Reassesment exclusions

I was on here this morning asking about reassesments.
My very good friend works for a benefit office and hes told me that from  october 2018 anyone with severe ongoing illnesses will be exempt from a  esa reassesment and will be notified when there due for a reassesment if they are exempt or not. He doesnt work for one by me he lives far away but i reckon it is the same for all claiments. He says its on the goverment website
It doesnt state any thing regarding a crumbling spine or severe back problems but my prognosis is that i can never work again as anyone else heard of this lately