My 19 year old son has a moderate fever (101) for 24+ hours, moderate headache, neck ache, body aches, chills, sweating. These are the same symptoms he had about a month ago, except that his fever reached 104.5. At that time I took him to the ER. He tested negative for mono, flu, and meningitis (They did a spinal tap). He s thrown up and had diarrhea. He left work early today after throwing up. I m not sure he ever got rid of whatever he had a month ago.