If you sense your child is seriously ill, follow your instincts and contact your doctor, especially if he/she exhibits the following signs:
Less than 3 months old and has a fever Maintains a fever for over 72 hours Extremely irritable, fussy, and/or cranky Incredibly lethargic, sleepy, or non-responsive Persistently coughs and wheezes Fever combined with a rash or other signs that worry you