They’ve been preparing for the worst for decades, but are survivalists, or “preppers,” really ready for the coronavirus outbreak? Ron Hubbard, owner of Atlas Survival Shelters, is banking on it as he sells survival shelters which he says are more in demand than ever. But writer Mark O’Connell, author of the upcoming “Notes from an Apocalypse” is not so certain the preppers have it right. And Beth Healey, a British medical doctor who spent a year at Concordia Station in Antarctica, has some insight into the psychological effect radical self-isolation can have.