While respiratory syncytial virus (RSV) may present like the common cold in many healthy children, it can be dangerous in babies and some young children.

The flu is a highly contagious infection that can cause a sudden high fever at or above 100.4°F (38°C), body aches, cough, and more.

Reye syndrome is a rare but serious and potentially life-threatening illness that is linked to the use of aspirin and aspirin-containing products in children and teenagers during a viral illness.