Valley fever, also known as coccidioidomycosis, is caused by a fungus, not something found in the soil itself. The fungus, Coccidioides, lives in the soil, particularly in arid and semi-arid regions with alkaline soil and hot, dry climates.

Here's a breakdown:

* The Fungus: Coccidioides exists in the soil as spores. These spores become airborne when disturbed, for example, by wind, construction, or agricultural activities.

* Inhalation: People breathe in these spores, and the infection begins.

* Not Directly in the Soil: The soil itself doesn't cause the disease; it's the presence of the Coccidioides fungus that is the key factor.

Key Points:

* Valley fever is not contagious from person to person.

* The disease is most common in the southwestern United States, particularly in Arizona, California, Nevada, New Mexico, Texas, and Utah.

* People working or living in these areas are at increased risk, especially those engaged in activities that disturb soil, like construction, farming, or gardening.

If you're concerned about valley fever, it's best to consult a medical professional.