ABC News medical correspondent Dr. Darien Sutton explains what a febrile seizure is and when. You should go to the hospital.

Varicella, known as chickenpox, is caused by the varicella zoster virus (VZV), with an estimated 84 million cases annually. It primarily affects children, for most of whom it is a self-limiting ...

Although the majority of infected individuals will exhibit a self-limited acute febrile illness or remain asymptomatic, influenza can lead to significant morbidity and mortality. Each year ...