There is most likely a secondary means to stop it, which is what they are calling "herd immunity". Right now they don't know how long the antibodies stay active in your system, but assuming it's a decent amount of time it would likely keep the vast majority from spreading the disease to such levels that it would overwhelm the nation. Honestly this is really the big unknown right now, how many people might have already had it and have antibodies? Stanford did a sampling study in California (Santa Clara county maybe?) and figured that of the county population, roughly 50-85,000 people would have tested positive. At the time, the county had 1,000 "confirmed" cases. My instinct tells me that the numbers shown LOOK like this disease is spreading like wildfire, it's more likely that many already had it and the testing is just now catching up. Is it contagious? Yes, very it seems. Is the only way to stop it run and hide? I'm not a doctor, but many infectious disease experts I've seen and heard have said that short of a vaccine (which might take months/years/if ever) having a bunch of people with it already is the best way to stop it. Same principle as preventative burns in fire fighting, if you already burned the fuel there's nowhere for it to spread to. Again not to arouse anyone's sensitivities here, but MY biggest concern is that while this thing has proven somewhat dangerous, by limiting EVERYONE (including the vast majority who will get this and show little, if any symptoms) that we are kicking the can down the road.