my policy book states "Attention parents of siblings, if one child is too sick to attend daycare then you must keep the other child at home too" What is the parent going to do drag the sick child out so the sibling can attend daycare? the parent is home already with one so might as well keep them both. Also if its contagious then the other child will likely get it not always but the chances are greater. its also hard on the healthy child knowing the parent is at home. its just easier to keep them both at home.