Inclusion Criteria:  Age 18 years or older Ability to understand study procedures and to comply with them for the entire length of the study. Ability of individual or legal guardian/representative to understand a written informed consent document, and the willingness to sign it. Current smokers [(smoked at least 100 cigarettes in lifetime, daily or non-daily smoking in the past 7 days and at least 5 cigarettes per day, verified by expired Carbon Monoxide (CO)>= 8 parts per million (ppm) who smoke in their homes. Expect to live in the PSH site for at least 12 months English proficient.  Exclusion Criteria:  1. Contraindication to any study-related procedure or assessment.