@Mama, it is actually a fungus ;) AZ is thick with it, but so is a lot of the southwest US, and northwest Mexico. Most have more mild symptoms. The person I know got it in So. CA and needed a lung resection. The doc's thought it was cancer, but it was a bouncing, baby fungus.
Here is a little blurb Mayo simplified, for enquiring minds.
www.mayoclinic.org/diseases-conditions/valley-fever/basics/definition/con-20027390 Big Hugs