When Bay Area cities clear homeless encampments, proponents of such plans often say they're trying to fix a public health issue, or that encampments have become too unsafe or unhealthy. But some are making the case that treating housing as an issue of public health is more effective. Dr. Joshua Bamberger says it doesn't matter what medicines he prescribes -- they won't help if his patient doesn't have a home. Guest: Dr. Joshua Bamberger, associate clinical professor of family and community medicine and UC San Francisco