Hi, I m sorry to hear your daughter has been so sick. I agree with your doctor that this is most likely a virus, either one of the many viruses that cause the common cold , or the influenza flu virus. With the vomiting influenza might be more likely. Either way, antibiotics do not help with a virus and most of the treatment is just trying to minimize the symptoms. Assuming she is a child, you could treat the cough with honey (it can be mixed with tea or juice) which I ve found to be very effective and safe. A sore throat can be treated with lozenges if she is old enough, and the fever with Acetaminophen. Now, usually with viruses, after about 3-4 days she should start to get better, though a cough may last for several weeks. But if she is getting worse after this time, or continues to have fevers, I would return to your doctor to check for any new bacterial infection, such as ear or sinus infection, or pneumonia. Hope I have answered your query. Let me know if I can assist you further. Regards, Dr Aaron Branch, General & Family Physician