Measles is marked by prodromal fever, cough, coryza, conjunctivitis, and pathognomonic enanthem (ie, Koplik spots), followed by an erythematous maculopapular rash on the third to the seventh day.
Otitis media is the inflammation and infection of the middle ear, often resulting from viral or bacterial pathogens. Otitis media can lead to various symptoms, including ear pain, fever, hearing difficulties, and fluid buildup behind the eardrum.
Respiratory syncytial virus (RSV) causes infections of the lungs and respiratory tract. Infection with respiratory syncytial virus which manifests primarily as bronchiolitis or viral pneumonia, is the leading cause of lower respiratory tract infections (LRTIs) in infants and young children.