A child who appears unusually quiet and does not cry in a situation where distress is expected should raise concern for:

Varicella (HHV-3) typically presents with diffuse vesicular lesions in different stages of healing.

Both rubella and measles rashes typically spread in a cephalocaudal direction.

Koplik spots are a hallmark of rubella infection.

Measles is preceded by cough, coryza, and conjunctivitis.

Postauricular lymphadenopathy is more characteristic of rubella than measles.

Rubella rash typically starts on the face and spreads downward.

A child with bilateral parotitis develops testicular pain and swelling. Which additional complication is also classically associated with this disease?

Mumps orchitis in adolescents may lead to sterility and testicular atrophy.

Hand, foot, and mouth disease is most commonly caused by:

A major complication of roseola is:

Which medication should be avoided in children with viral illnesses due to risk of Reye syndrome?

Color vision depends on:

Older immunocompromised adult with prodromal pain and a unilateral dermatomal vesicular rash that does not cross the midline most likely has:

An irritable infant with a bulging fontanelle should raise strong suspicion for:

What is the preferred diagnostic test for HIV in infants younger than 18 months?

Which factor is associated with worse outcome after drowning?

Which complication is associated with drowning injuries?

Which finding after drowning is a poor prognostic indicator?