Question: My 8 months daughter had stomach virus. 8 days ago she developed fever, then last Thursday morning she vomited. By night she developed diarrhea. By Saturday she was fine, and we started to slowly give her soy formula. She threw up on Sunday afternoon, after taking formula twice (mornign and noon). We went back to pedialyte. She did not have any other symptomps but vomiting. On Monday she felt very sleepy and irritable and had very few wet diapers, so we increased intake of pedialyte. On Tuesday she was fine in the morning and we gave her soy formula, which she took twice (morning and afternoon), and then refused to eat for the rest of the day. In the evening around 8 pm she threw up. On Wednesday she was fine the whole day. We took her to the doctor, who suggested she had allergy to soy. We switched back to milk formula that she was taking for 5 months before the stomach virus. She took it on Wednesday night, and then on Thursday morning and early afternoon (today),. She threw up in the afternoon. Then she only took some pedialyte and two rice crackers. Then she threw up again. No other symptoms, except that her feet and hands are slightly cold, and her stomach does get bigger after feedings. She throws up formula that looks and smells fine, has no blood, nothing XXXXXXX no other problems. What could be the possible causes of such vomiting and what do we need to do?