How Severe is Hand, Foot, and Mouth Disease in Children?

My daughter has been suffering from a rash all over her body since last week, especially on her hands and face, which have been particularly prominent. The rash has also started to spread to the surrounding areas. By this week, she began to have a fever as well. Despite taking antipyretic medication for several days, it didn’t seem to help much. After going to the hospital, the doctor diagnosed her with hand, foot, and mouth disease. How severe is this condition?
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