All that trial-and-error crashing around is enough to make you want to stay inside, where the codes are known. Inside, you are the code. Recently, I spoke with Arthur Bregman, a psychiatrist in Coral Gables, Florida, who has been using a new phrase to describe our desire to stay at home: “cave syndrome.” Bregman has been seeing patients for more than forty years. As covid vaccinations have become more commonplace, he has noticed a reluctance to venture out again among his patients, even the fully immunized. “People can’t shake the anxiety,” he told me.