It is challenging enough to take care of a sick adult, but when children get sick, dehydrated, need intravenous fluids and look like near death, it is heart wrenching.
As an ER physician, I have taken care of many sick kids. Most of my colleagues would agree that comforting the crying child and sometimes the crying parents, attempting to draw blood or start an IV is really emotionally draining.
Unfortunately, according to a 2011 CDC report, children aged younger than 5 years continue to have the highest rate of food borne infections. Nationally every year there was 1 infection per ~ 1500 children.