But the spreading continues, and I can see it taking multiple generations to make a clear trend. It's not like in 2 weeks there are 10x more people, the R0 is n

But the spreading continues, and I can see it taking multiple generations to make a clear trend. It's not like in 2 weeks there are 10x more people, the R0 is not that high. You have to have enough to be noticeable compared to the previous visible amount.