@walidgellad How much do people travel back and forth?
I saw modeling early in the pandemic that even very low contact rates between regions (relative to in-region contact rates) were enough to transmit a surge from one region to the other.
@walidgellad人们来回旅行多少？
我在大流行的早期看到，即使区域间的接触率非常低（相对于区域内接触率），也足以将激增从一个区域传播到另一个区域。