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Coccidioides skin test indurationa size distribution among 36,789 California state prison inmatesb, January 2015. “Millimeters of induration were calculated as the mean of orthogonal diameters of induration at the skin test site and expressed in increments of 0.5 mm. bEighty inmates (0.21% of those tested) are not represented on the graph as they had mean indurations greater than 29 mm (range = 30–82 mm).
