1. Fever above 37.5 degrees Celsius by the time when the participant is randomised, a participant excluded for transient acute illness may be dosed if the illness resolves by the time of randomisation.2. History of infection with SARS or MERS3. Any drug therapy within 7 days prior to Day 1

1. Fever above 37.5 degrees Celsius by the time when the participant is randomised, a participant excluded for transient acute illness may be dosed if the illness resolves by the time of randomisation.2. History of infection with SARS or MERS3. Any drug therapy within 7 days prior to Day 1