Voice of San Diego brought a "solutions showdown" to its annual Politifest last weekend.A pair of panels took on different facets of San Diego's homelessness crisis: what to do about street homelessness and how to respond when people with behavioral health problems refuse treatment. We discuss the takeaways.Plus, a new book by a local science journalist tackles how to prevent future pandemics.Guests:Lisa Halverstadt, senior investigative reporter, Voice of San DiegoJim Hinch, South County reporter, Voice of San DiegoJon Cohen, science journalist and author of "Planning Miracles: How to Prevent Future Pandemics"