Croup

Video of cough and useful Paucis Verbis Card from ALiEM https://www.aliem.com/2010/paucis-verbis-card-croup/

Excellent but brief discussion here http://lifeinthefastlane.com/ccc/croup/

Nice plain radiographs depicting croup findings https://radiopaedia.org/articles/croup

Beware recurrent croup since it's mostly bad things http://pedemmorsels.com/recurrent-croup/