Last time I attended a Vegas conference, 2 weeks after a France conference, I came back with a bug so bad that even after I recovered from the illness I had lost 95% of my voice This went on for months afterwards. Docs said it may be a post-viral thing and my voice might eventually return. Or maybe not, Or maybe it was a big fat tumor pressing on my vagus nerve that supposedly went between my brain and heart. After a CT and MRI and several videos of my vocal cords from a tube up my nose and they said they had no idea.
My voice eventually returned on it own, 3-4 months later.
Vegas is the Devil.
Vegas is where the government legally tests out new toxins, it's been in all the conspiracy theory publications....ever heard of LSD testing on Soldiers during Vietnam, or how about with holding penicillin from black people in Alabama back in the 50s.....don't go, stay away, only death and disease will follow.