my son has been running a fever every day this week and it goes away with children's Tylenol. He is not very active during the day like he normally is when he is sick but in the evening when i am home he is. He is also very sleepy and pretty much takes about 4 naps a day every day this week. He does not want to eat much of anything either. He will only take a few bites of what we feed him and then he is done. According to my wife he has only thrown up once though. Our Pediatrician says it is just a virus based on what he is seeing and what he saw from doing the blood test.