A Study of AK0529 in Infants Hospitalized With RSV

Inclusion Criteria: * Male or female subjects of any race or ethnicity with an age adjusted for any prematurity of ≥1 month and ≤24 months. * Diagnosis of RSV infection by virological. * Subject must weigh \>3 kg at screening. * Must have provided written informed consent for the subject to participate. * For patients aged \<12 months, and occipitofrontal head circumference (OFHC) within the normal range for age and gender. Exclusion Criteria: * The subject has taken, is currently taking or requires any restricted medications. * Subject is known to be HIV-positive (or the mother, if the potential subject is a child aged \<6 months). * Participation in an investigational drug or device study within 30 days prior to the date of screening. * Requires vasopressors or inotropic support at the time of enrollment. * Concurrent gastrointestinal conditions that could, in the opinion of the investigator, prejudice absorption of the Investigational Medicinal Product (e.g. protracted vomiting, malabsorption syndrome, a history of necrotising enterocolitis with consequent short gut syndrome). * Bronchopulmonary dysplasia or chronic lung disease requiring assisted ventilation at the time of enrollment. * Diminished ventilatory reserve at risk for hypercapnia (e.g. pulmonary hypoplasia, sequestration syndromes, cystadenomatoid malformation, a history of surgery for diaphragmatic hernia). * Left to right shunt meriting corrective therapy.