Increase in Valley Fever (coccidioidomycosis) In California, USA

A major increase in the number of people infected with valley fever has been noted by California health officials. In the first quarter of this year (2025), more than 3,000 cases were registered across the State. This number is nearly double the 10-year average.

Advice

It is difficult to prevent inhalation of the fungal spores in areas where they live in the soil and dust, but the risk of getting valley fever is low, even in dusty areas. People who are at increased risk include persons with weakened immune systems, pregnant women and people with diabetes. People at risk who visit areas where this fungus is found can minimize the risk of exposure by avoiding areas with lots of dust (construction or excavation sites), staying inside and closing the windows during dust storms, avoiding activities that have close contact with dirt or dust (gardening or digging), and cleaning skin injuries well with soap and water.