My area (Calderdale ) has been pretty bad through all the peaks except the first one. This time its been noticeable that some of the more rural areas have been much worse hit than previously but even so, some of the same areas are getting hit again and again. There doesn't seem to be much evidence that the virus has burned itself out anywhere. It really puzzles me that London gets short peaks and drops down pretty low again when in other parts of the country it just seems to grind on and on.
I'd agree that phrases like "burned out" dont end up doing the situation justice.
Different age groups and different sections of society in different parts of the country are certainly experiencing increases and falls at different times.
As time goes on it may be more appropriate to use concepts like burned out in a more limited way, eg if the virus hasnt run out of people to infect but has run out of sufficient people and opportunities that very large and rapid increases in growth result that lead to massive fresh peaks.
So maybe for now I'd prefer to think about this stuff in terms of whether some ceilings have been imposed in some places and some groups.
A few expert voices have started talking about equilibrium and endemic phase in recent months. Thats still a bit premature in my book, or at the very least I'd say that if we peer below the surface of periods that it is tempting to think demonstrate equilibrium, I'm more likely to find a messy picture involving opposing trends cancelling each other out when only viewed at the broadest level. So not real equilibrium, but perhaps a range of views on the road to equilibrium. Not that that desitnation is assured since in theory things can come along which leave more peoples susceptible again.
For now I do consider it appropriate to think about it in terms of some delicate balances involving levels of immunity. And since there unknowns about what will happen on the waning immunity front, such balancing acts may wobble quite a lot over time. And there are further complications because its not clear the extent to which waning immunity will affect not just peoples chances of catching it, but being hospitalised or dying, eg the virus might gain the chance to bounce back more in terms of number of infections, but not all of that rise will filter down into hospitalisations and deaths if some other vital parts of the immune system wane against this virus at a slower rate.
These sorts of things mean I am still stuck making posts like this one, talking about the situation being messy and not having any clearcut predictions for the next few months to share with anyone.
As for why some of the same places seem to come up time and time again, I'd agree that I've seen some patterns in this regard. eg places like Kettering and Leicester have come up on the pandemic radar on more than one occasion, just to pick a couple of examples that I've seen directly for myself when studying specific data. Theres a bunch of reasons why this may be the case, and its worth trying to avoid the assumption that just because a place had newsworthy levels of infection in the past, the virus had run out of further large opportunities there in future. Maybe those places had ridiculously large potential for number of infections in the first place, and even a horrible prior wave only ate a chunk of that potential.