All is not lost.
Remove all residue.
Apply 1001 Spot Shot or 1001 Troubleshooter over the area.
Gently wipe stain from outside to centre without rubbing too hard.
Allow to dry and reapply if necessary.
Vacuum when dry.
2 or 3 light applications are more effective than one drastic application.
After treating the stain, blot up any excess liquid.
To neutralise underlying vomit odour
Mix 1 tablespoon household ammonia to 1 pint warm water (keep room well ventilated).
Gently wipe over the area – do not overwet.
Always test an inconspicuous area before use.