Does anyone have immunoglobulin infusions to treat brittle asthma?

Hi there

I am currently recieving immunoglobulin infusions to treat my brittle asthma ive been having them for 6 months. apparenly its just being trialed and there not sure how it helps asthma but studies have found that it does.

Just wondered if anyone else has had them or having them and how long they had them for was it a benefit??