Joseph is a 14 year-old, generally well and up-to-date with health maintenance, who presents for a sick with a 36 h hx of gradual onset nausea, vomiting and loose stools, reporting “I’m not sure how many times I threw up or had diarrhea.” He last vomited about 4 h ago, last stool was around 2 h ago, reported as yellow brown in color, small volume and without blood. He has been tolerating a sips of clear liquids for the past 3 h and voided a small amount around 2 h ago. Joesph reports th...