The Relationship Between Reproductive Number and Disease in the Pandemic

The relationship between something like the effective reproductive number of sarcovito and mobility can change quite a bit. A model that is incredibly well fitted with a ton of information at a certain point might change when it goes to a different epidemic phase, right? So for example, early on in the pandemic the us. After march 15 20, 20, a lot of metrics that calculated where how much people were moving decreased or justen almost went off a cliff. But again, as the pandemic moves on, that relationship kind of decouples. And perhaps most importantly, even at the very ear stages where our model does an incredible job of linking the effective reproduction number to mobility, it performs