Setting and Participants: The study, employing a prospective, randomized, and double blind design will be conducted in three primary care facilities serving a diverse racial and socioeconomic population. Children will be eligible for the study if they are between the ages of 1 and 10 years and present with one of three clinical presentations. Group 1 will be comprised of subjects with persistent disease defined as nasal discharge (of any quality) or daytime cough (which may be worse at night) or both persisting for more than 10 days without evidence of improvement; Group 2 will be patients with non-persistent disease consisting of two subsets: children with nasal discharge or daytime cough that is worsening either on or after the 6th day (> 120 hours) of symptoms [worsening is manifest by the new onset of documented fever (temperature > 100.5o F ) or substantial increase in nasal discharge or cough] and children with severe disease defined as a documented temperature of at least 102o F and purulent (thick, colored and opaque) nasal discharge present concurrently for at least 3 consecutive days (68-72 hours).