Hello and thanks for the query
This could be a viral infection and causing vomiting
. Follow certain precautions like:
1. Give only fresh milk to your child.
2. Clean the bottle properly before every use.
3. Protect your child from changing weather and wet cloths.
4. Give her antiemeetic syrup like Emset to control vomiting.
5. Keep your child hydrated.
If you find any other sign like fever
than consult your Physician for proper antibiotic. Hope this will help you.