I hope everyone feels better soon.
Below is some more info about breastfeeding during illness. The great thing about breastmilk is that it is so rapidly digested. If there is any amount of time between nursing and vomiting, chances are good that some of it was digested first, offering nutrition and hydration. Not to mention the illness-specific antibodies that are present!
Blessed (breastfeeding during severe vomiting)
From kellymom.com (non-LLL):
My baby is sick - should I continue to breastfeed?