A child is brought in by their mother with complaints of fever and a vesicular rash on the hands, feet, and mouth. What is the most likely causative agent?

The described condition is characteristic of hand, foot, and mouth disease (HFMD), which is most commonly caused by Coxsackievirus A16, a member of the enterovirus family. The disease typically affects young children and presents with a combination of: Fever Vesicular lesions on the palms, soles, and oral mucosa This self-limiting viral illness spreads via respiratory droplets, direct contact, or contaminated surfaces. Other options: Varicella-zoster virus causes chickenpox, which presents with a widespread vesicular rash, not localized to the hands, feet, and mouth. Herpes simplex virus causes herpetic gingivostomatitis, with lesions mainly on the oral mucosa and perioral skin, but not on the hands and feet. Epstein-Barr virus is associated with infectious mononucleosis and does not present with vesicular rashes.