A 14-year-old boy with no significant history presents to th…

A 14-year-old boy with no significant history presents to the clinic with his parents with reports of dyspnea and wheezing. He states that his symptoms only occur when he is running track in the cold weather. The patient’s parents explain that his two siblings have been home sick with a cough and fever. On exam, vital signs are within normal limits and lungs are clear on auscultation. Which of the following is the most likely diagnosis?

A 16-month-old presents to the clinic with her parents for c…

A 16-month-old presents to the clinic with her parents for cough. The father reports the child’s illness started 3 days ago with a runny nose but is now more of a cough. The child’s vital signs show a respiratory rate of 24 breaths per minute, temperature of 101.4°F, and oxygen saturation of 94%. There is mild wheezing on auscultation. You suspect a diagnosis of bronchiolitis. Which of the following would be a predictor of more severe disease?