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On the downside of the Delta wave, vaccinations make all the difference

Summary:
Coronavirus dashboard for September 13: on the downside of the Delta wave, vaccinations make all the difference With each passing day, it becomes increasingly likely that the peak of the Delta wave was just before Labor Day. We’ll probably get a pop in the weekly average number tomorrow, as today’s numbers replace the Labor Day holiday numbers, but unless there is a big surprise, it appears we are into the downside of the wave. But we are still on the upside when it comes to deaths, which probably won’t peak for another week or two.Below are cases (solid line) and deaths (dotted line) for the past year: The winter wave peaked at an average of 250,000 cases and 3,500 deaths/day. If that ratio exists for this wave, deaths will peak at

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Coronavirus dashboard for September 13: on the downside of the Delta wave, vaccinations make all the difference

With each passing day, it becomes increasingly likely that the peak of the Delta wave was just before Labor Day. We’ll probably get a pop in the weekly average number tomorrow, as today’s numbers replace the Labor Day holiday numbers, but unless there is a big surprise, it appears we are into the downside of the wave.

But we are still on the upside when it comes to deaths, which probably won’t peak for another week or two.
Below are cases (solid line) and deaths (dotted line) for the past year:


On the downside of the Delta wave, vaccinations make all the difference

The winter wave peaked at an average of 250,000 cases and 3,500 deaths/day. If that ratio exists for this wave, deaths will peak at roughly 2400/day. But at the June trough, there were 11,300 cases and 218 deaths. Cases increased over 14x to their peak. If deaths do the same, their peak will be just over 3,000/day – at some point by the end of this month.

So the next couple of weeks are going to look pretty grim as to deaths, and it’s already baked in the cake.

More evidence that we are on the downside of the wave for cases comes when we examine what is happening with the first hard-hit States, shown in bold in the graph below:


On the downside of the Delta wave, vaccinations make all the difference

It is very clear that in all cases except for Wyoming, the wave has peaked, and in some cases, the decline is already precipitous. Wyoming is something of an exception because it never really got below 10 cases per 100,000/day, even in June.

Meanwhile, the benefit of vaccinations is extremely clear in the State-by-State evidence. Here are the 10 least vaccinated States:


On the downside of the Delta wave, vaccinations make all the difference

These States make up the vast majority of the worst-performing States for infections during the Delta wave.

At the other end of the scale, here are the 10 most vaccinated jurisdictions:


On the downside of the Delta wave, vaccinations make all the difference

With the exception of Hawaii (not sure what happened there), these States and Puerto Rico are the best-performing of all the US jurisdictions. Vaccinations work!

I anticipate paying particular attention to all of the northern US States in the coming several months, to see if the cooler weather increases Delta’s footprint there, and if so to contrast the extremely well vaccinated New England States with the extremely poorly vaccinated States of the northern Plains and Mountain West.

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