7W7FEVER

Monica Almeida/The New York Times

Kandis Watson talks with her son Kaden, 8, who almost died from valley fever, in Bakersfield on June 28. Coccidioidomycosis, or valley fever, is an airborne disease spread by fungal spores that rest in the soil until they are picked up by a wind and lodged into the moist tissues of lungs and other organs.

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