Coccidioidomycosis, commonly known as Valley Fever, is a fungal infection caused by Coccidioides species found in soil. It primarily affects the lungs and is most common in arid and semi-arid regions of the southwestern United States, Mexico, and Central and South America. People acquire the infection by inhaling airborne fungal spores.
Transmission methods vary. Please consult CDC or WHO resources for specific information.
Contagious Period: Varies by disease
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View WHO Resources →Disease information on Virus Watcher is reviewed by our Chief Epidemiologist, a former CDC lead analyst for FluSight forecasting. Outbreak data is aggregated from verified sources including BEACON, ProMED, WHO, CDC, and 50+ national health agencies. This information is for educational purposes and should not replace professional medical advice.
Last reviewed: 2026-03-05
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