Doh! Sick child #2

First I spent Friday night up with a sick Timothy who kept throwing up every few hours or so.  Saturday he only ate a small bowl of cheerios, then that came up an hour or two later.  Sunday he was still just lying about, but he did eat four (small) bowls of cereal at once.  Today he's completely normal.  Now late tonight Leanna began throwing up.  Of course I had a sink full of dishes when she had to run out to throw up!  Gross!  So now I'm wondering if it will slowly spread throughout the whole family.  Just what we need now.