How can you make sure you don't get coccidiomycosis?

Avoid San Joaquin. Valley and other areas of the southwest & northern mexico where the mold, coccidioidomycosis immitis is found. The high frequency of cases in central california led to the name "valley fever". C. Immitis is dormant in dry weather & becomes active in the rainy season. So you can probably visit fresno in the summer. Anyone is susceptible. Half the folks living in endemic areas have been infected.
Stay out of the Amer. This mold is endemic in the southwest. It usually causes a mild illness in exposed individuals, but can cause severe disease in susceptible individuals.Certain ethnic groups and immunosupressed individuals are more prone to this presentation.