With Covid-19 swamping the United States, Dr Jeffrey Siegelman spent 40 days and nights living in the basement of the family home, couch-bound and self-isolating. While he suffered from headaches, dizziness, low-grade fever and mounting worries in his underground den, his wife and children spoke to him only via walkie-talkies or through the banister at the top of the stairs. He claims he’s a better physician as a result.  Dr Siegelman...