Wondering about why some people are struggling so much with GG while others, like me, are not.... There's probably 1000 reasons why we'd respond differently and I'll never think of 995 of them, of course.

The one I'm currently wondering about is pathogen load, as mentioned in posts above. I didn't get IVIG until I had years of AVs, abx, Equilibrant, etc, etc behind me. Maybe if I'd been able to get IVIG early on, before I reduced my pathogen load, I'd be miserable on IVIG too. I did have a major IRIS-like rxn on Valcyte, which was my first major pathogen treatment. Maybe if I'd had IVIG first, I'd have had a rough time with that. Who knows? Nobody, I think.
Truth is, doctors have knowledge of GG from working with uncomplicated (

) CVID, but they don't have much experience with immune dysfunction compounded by ME. That may make it hard to predict how any individual among us is going to respond, or to explain some of the responses we're seeing. We know so very little about ME.
