The ladder of risk — COVID-19 edition

Figure 1: Illustration of COVID-19 viruses (source: Harvard University)

During the COVID-19 pandemic, just about everyone is at risk of getting exposed to the virus and getting infected. You don’t have to be a medical or scientific expert to understand how to protect yourself, but you do have to understand how your choices for protecting yourself can change your risk of infection. If you know even a little bit about ladders, you know more than enough about risk and how to make choices to reduce…