I'm in agreement with Patricia Gima and her experience with stomach flu and
breastfeeding infants.  My own experience was the same: I nursed when ever the
baby wanted and mopped up the vomiting afterward.  With all situations like
this my infant's recovered much quicker than the rest of us.  Many times only
vomited a few times at most  (and were usually better after 4-6-8 hours) when
all others in the family were vomiting for 24 hours or so.  Breastmilk is more
comforting than ORTs (pediolyte).
It is so hard to "fight" (keep) a baby away from the breast when he or she is
sick.

Mary Caldwell, IBCLC and mother of five -- breastfed all.