L.U.
I grabbed my husband before he went downstairs and asked hijm since he is a car detailer by profession. He says to get some vinegar (not a lot) and some dish soap and a warm bucket of water. (mix it together) then take a cloth and scrub the seats and carpet. Take a dry cloth and go over the wet spot. Take baking soda and sprinkle it on the carpet and seats and let it sit for a while. THen take a shop vac and REALLY suck up the soda. Go at it for a while since the puke goes down to the floor board.
We have cleaned puke out of my car more times than I care to remember and this has always worked for us. Good luck
L.