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A 13-year-old boy with a history of moderate, persistent asthma was transferred to our facility from an outside hospital with shortness of breath and cough of 2 days' duration. In the emergency department at the other facility, initial vitals were temperature, 98.9°F; heart rate, 120 beats per minute; respiration rate, 40; pulse oxygen saturation, 87% on room air; and blood pressure, 191/63 and 128/41 upon repeat. Screening laboratory tests were performed: the complete blood count was withindoi:10.1542/hpeds.2016-0005 pmid:27488209 fatcat:agjwizdzyfhbzpilowag6lfho4