Fig. 1.

Daily number of asthma hospitalizations. Total hospitalizations in the eight largest metropolitan areas in Texas from August of 2004 to August of 2005, where markers indicate the first day of the month. Daily count values (light gray) and a spline-smoothed value (dark gray) in (A) children ages 5–18 y old and (B) adults ages 19–55 y old. In 2004, most Texas schools started in mid-August, took a 2-wk winter break in late December to early January, and took a 1-wk spring break in late March.