['respiratory syncytial virus infections']
['als-008176', 'vehicle']

        Inclusion Criteria:

          -  Age 18 to 45 years, inclusive.

          -  In good health with no history of major medical conditions

          -  A total body weight ≥ 50 kg and a body mass index (BMI) of > 18kg/m2.

        Exclusion Criteria:

          -  Acute or chronic medical illness

          -  Positive for Human Immunodeficiency Virus, Hepatitis B or C

          -  Nose or nasopharynx abnormalities

          -  Abnormal lung function
      