I suppose that observation suggests a strategy of identifying and absolutely isolating the vulnerable along with a group of caretakers, then allowing the remainder of the population to take their chances. Of course this assumes that once infected, immunity develops for a period. How long would we need to isolate the vulnerable? Hopefully the immunity period is longer than the time required to develop a vaccine. Even with a vaccine, can we inoculate enough people to control the next outbreak and what part will the anti-vax population play?