My parents, siblings, and kids normally get together every Sunday night for family dinner. Due to the covid (coronavirus) outbreak, which recently arrived in Minnesota, some of us have asked whether it's time to suspend the meal and switch to a weekly Skype call instead. It's a sensible question! It's not at all obvious how to actually quantify and weigh the risk of family dinner. On Wednesday night (March 11th), I thought about it and wrote this in response.