MS-1918

A 30-year-old woman visits her doctor complaining of coryzal symptoms that have been present for three days. She reports feeling slightly fatigued, having a sore throat, runny nose, and dry cough. She has been using over-the-counter medications to alleviate her symptoms. Her vital signs are within normal limits except for a temperature of 38.4ºC.

What cytokine is most likely responsible for her elevated temperature?