Inclusion Criteria:  Adults aged 18 years and above Adults residing in the study area with an intention to stay within the auspices of the sites until the completion of the study Adults who have consented to take part in the study  Exclusion Criteria:  Children or adolescents aged less than 18 years Adults either outside of the study area or have no intention to stay within the study area Adults unable to provide informed consent (e.g. severe cognitive impairment, recent (within one month) myocardial infarction, unstable cardiovascular status, aneurysms (abnormal dilatation of blood vessels), hemoptysis (blood in the cough), pneumothorax (abnormal trapping of air in the walls surrounding the lungs), recent eye, thoracic or abdominal surgery and facial palsy (paralysis of the face muscles)) Adults unable to complete the study questionnaires in their own language (trained study researchers will be involved to supervise completion and read the questions as necessary )