Dust storms are scary enough in a car. I can't imagine one on a bike! Just to set your mind at ease about Valley Fever, I found out last year that I had had it, without even knowing it. I went for a CT scan of my lungs for another reason and there was a weird looking scarred area. My internist here in MA freaked out and sent me to a pulmonary doc. He put my scan up on his computer screen, looked at me and said one word, "Cocci... I bet you used to live in AZ." So, it does not have to be something terrible, because I never knew I had it.