Re-opening is a knapsack problem. Your budget is Rt (effective reproduction number) which has to stay at or below 1. All social and economic activities have a

Re-opening is a knapsack problem. Your budget is Rt (effective reproduction number) which has to stay at or below 1. All social and economic activities have a benefit to society and a cost in terms of Rt. The goal is to get to Rt = 1 while maximizing the benefits to society. The problem is that covid is so contagious that many activities have a very high cost. Seen this way, maybe it makes sense to throw bars and indoor dining out of the knapsack so we can put schools in.