These are strange and disturbing times, as each of us confronts fundamental issues about health and our society. The three epidemics vary in how long they have been with us, how they cause harm, and how they could be remediated. The harms from smoking date back over one hundred years, when it was discovered how to mass-produce cigarettes at low cost, thereby making it possible to consume large amounts of tobacco smoke every day. Covid-19 is but the most recent of many viral pandemics, and the most menacing one since the 1918 influenza outbreak.