Knock knock Hello, Dr. McDoctorface. I'm really worried about my child. My name is Sarah, and my child's name is Emily. She's 7 years old, and she's been feeling really sick lately. She has a high fever, a persistent cough, and she's been complaining of a sore throat. She's also quite tired and has no appetite. I just don't know what's causing all of this. Can you please help us?