Even with widespread testing, until a vaccine is available, there are entire industries that will have less than half the pre-virus business: airlines, hotels, cruise ships, theme parks, and sports, to name a few, as well as myriad other businesses supporting or related to these industries. In addition, more than a few large retail department and specialty store chains will probably not make it. No need to list names, but they are the obvious weak ones prior to COVID-19.