This is awful. I met Shawn in person in late summer 2016 in a cramped little Starbucks across the road from the hospital where he was having Rituximab treatment. Wearing a hospital gown under his clothes, he sipped his coffee from a disposable paper cup and took his lunch with single-use wooden chopsticks to reduce the chances of "catching something" while Rituximab worked over his immune system. He took a risk coming out to that Starbucks to meet with me, but he did. I think that bravery describes Shawn in a nutshell.
His depth of knowledge on AE impressed me, as did his experiences of treatment (and mistreatment) in various countries and the international network of medical professionals he built around himself with apparent effortlessness. I like to think that he died on his own terms, not in the hands of NHS incompetents, but travelling the world in search of a cure - his cure - raising awareness of AE everywhere as he did so.
Rest in peace, Shawn. You will be missed.