Sore throat, often severe. Glands swollen in neck and by ears. Sometimes a fine rash over whole body. Skin may look yellow. Low fever that seems to stay for many days.
Child feels weak and tired.
Two to eight weeks, may be shorter in children than adults. Uncertain - may be several months. Unclear how it is spread - usually close personal contact, e.g., sharing toothbrushes, toys, kissing, etc. It may take several weeks until your child feels back to normal. May need to keep child home from school.