Given the nature of the interventions, participants will be un-blinded to the intervention received although they will be blinded to the nature of the other interventions. The same will apply to our research nurses who will be educating participating households on uses of assigned interventions and prevention of influenza transmission. Nurses will initially be randomly assigned to administering one of the three interventions and will receive training relevant to their assigned intervention only, hence avoiding potential cross-contamination by nurses.