I just got back from a week in Japan. To figure out if the theories of flattening the curve are accurate Japan will be the country to watch. While it is damn near a worst case scenario in terms of proximity of people ( lots of people in a small space), I would estimate that 95% of the population is wearing masks at all times, many people are avoiding travel, hand sanitizers available everywhere (some places greet you at the entrance of a place and require you use the hand sanitizer before entry). As a society as a whole they are smarter than we are in terms of common sense regarding an infectious virus, and are more cognizant of what practices to proceed with and what practices to avoid. If flattening the curve is the best practice, Japan will be the country that proves it.