<s>[INST] My son is 15. He had a 102.0 temp and his body aches, his neck shirts and he sounds all stopped up. We went to the Dr. Today and they did test for flu, mono, and strep. All were negative. He seems to be getting worse tho. They prescribed no medicine, only said he needed to drink fluids and rest. Any other advise u could give? [/INST] Welcome to the ChatDoctorI understand your concerns. Don't worry. Since the tests for mononucleosis, strep and flu are negative, it seems that your child is suffering from a self limiting viral illness. These infections require symptomatic treatment, good diet, plenty of fluids and rest as suggested by your doctor. I would recommend you acetaminophen and ibuprofen combination Chat Doctor.  It will help in fever spikes and body ache. You may repeat the dose every 6-8 hours if fever persists. In case the symptoms persist after 2 days or there are any new symptoms, the visit your doctor for complete clinical examination and treatment accordingly. Hopefully this will be of help. I would be happy to help you in any further questions. Take care </s>