My brother has coccidiomycosis. Should I be worried about this?

Valley Fever. For yourself, no. For your brother it depends on whether he has a mild or complicated case. Coccidioidomycosis aka valley fever is an infection caused by inhaling the microscopic spores of the fungus coccidioides immitis. The lungs are the primary organ of involvement. Try this website for comprehensive information http://www.Valley-fever.Org/.