Thursday, June 11, 2020

The new usual suspects?

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The good news is that the rate of increase in new Covid-19 deaths in the US is still slightly declining, but the bad news is that still leaves us in the range of 900-1,000 deaths a day for the foreseeable future – since the lower rate of increase is offset by the increase in the base number itself. And new cases are still bumping around in the same 20-25,000 range that they’ve been in since early April.

What is changing is the state-by-state numbers. If you look at new deaths yesterday, you find California on top (which is a relatively new position for them), followed by the usual suspects: New Jersey, New York, Illinois, Pennsylvania and Massachusetts. But what about new cases? There we see a different set of actors altogether. California leads those numbers, too, but they’re followed by Texas, Arizona, Florida, North Carolina and Georgia in that order.

In other words, with the exception of California, none of the new case leaders are also new deaths leaders, and vice versa. The big question becomes: Will these new case leaders become new deaths leaders 2-3 weeks from now? Or is it possible that those states have figured out a way to effectively lower the case mortality rate, so that deaths aren’t anywhere near the level they were when New York and New Jersey were overwhelmed with cases more than a month ago?

It does seem that the coronavirus gets slowed down by sunlight and heat, but a caution there is that Arizona is probably the closest of these new case leaders to having an overwhelmed hospital system. While they certainly have a lot of sunlight and heat, they don’t have a lot of humidity, and that may be helping in states like Florida and Georgia.

But this also illustrates that all states need to be expanding their testing, contact tracing and isolation capabilities. A new wave in the fall could be devastating, since it’s pretty clear Americans aren’t going to go back into lockdown mode – yet in many states they’ll be less and less tempted to be outside in the fall. The only thing that can keep that wave from being much worse than the current one is if we can identify and isolate new cases quickly and trace and isolate their contacts. We certainly didn’t have that capability when we really needed it in March, April and early May, which is why we’re now in the position of having temporarily restrained the coronavirus, but by no means having defeated it.

The numbers
These numbers are updated every day, based on reported US Covid-19 deaths the day before (taken from the Worldometers.info site, where I’ve been getting my numbers all along). No other variables go into the projected numbers – they are all projections based on yesterday’s 7-day rate of increase in total Covid-19 deaths, which was 5%.

Note that the “accuracy” of the projected numbers diminishes greatly after 3-4 weeks. This is because, up until 3-4 weeks, deaths could in theory be predicted very accurately, if one knew the real number of cases. In other words, the people who are going to die in the next 3-4 weeks of Covid-19 are already sick with the disease, even though they may not know it yet. But this means that the trend in deaths should be some indicator of the level of infection 3-4 weeks previous.

However, once we get beyond 3-4 weeks, deaths become more and more dependent on policies and practices that are put in place – or removed, as is more the case nowadays - after today (as well as other factors like the widespread availability of an effective treatment, if not a real “cure”). Yet I still think there’s value in just trending out the current rate of increase in deaths, since it gives some indication of what will happen in the near term if there are no significant intervening changes.

However, it’s 100% certain that deaths won’t stop at the end of June! They might decline some more this summer, but Drs. Redfield (CDC head) and Fauci both predict there will be a new wave of the virus in the fall, and one noted study said there was a good probability the fall wave would be greater than the one we’re in now, as happened in the 1918 pandemic.

Week ending
Deaths reported during week/month
Avg. deaths per day during week/month
Deaths as percentage of previous month’s
March 7
18
3

March 14
38
5

March 21
244
35

March 28
1,928
275

Month of March
4,058
131

April 4
6,225
889

April 11
12,126
1,732

April 18
18,434
2,633

April 25
15,251
2,179

Month of April
59,812
1,994 (= 1 death every 44 seconds)
1,474%
May 2
13,183
1,883

May 9
12,592
1,799

May 16
10,073
1,439

May 23
8,570
1,224

May 30
6,874
982

Month of May
42,327
1,365 (=1 death every 63 seconds)
71%
June 6
6,544
935

June 13
6,142
877

June 20
6,479
926

June 27
6,834
976

Month of June
27,773
926 (= 1 death every 93 seconds)
66%
Total March - June
133,970


Red = projected numbers

I. Total deaths
Total US deaths as of yesterday: 115,140
Increase in deaths since previous day: 981 (vs. 1,053 yesterday)
Percent increase in deaths since previous day: 1% (this number was 1% yesterday)
Yesterday’s 7-day rate of increase in total deaths: 5% (This number is used to project deaths in the table above – it was 6% yesterday. There is a 7-day cycle in deaths, caused by lack of reporting over the weekends from closed state offices. So this is the only reliable indicator of a trend in deaths, not the three-day percent increase I used to focus on, and certainly not the one-day percent increase, which mainly reflects where we are in the 7-day cycle).

II. Total reported cases
Total US reported cases: 2,066,611
Increase in reported cases since previous day: 20,627
Percent increase in reported cases since yesterday: 1%
Percent increase in reported cases since 7 days previous: 9%

III. Deaths as a percentage of closed cases so far in the US:
Total Recoveries in US as of yesterday: 808,551
Total Deaths as of yesterday: 115,140
Deaths so far as percentage of closed cases (=deaths + recoveries): 12% (vs. 13% yesterday)
For a discussion of what this number means – and why it’s so important – see this post.


I would love to hear any comments or questions you have on this post. Drop me an email at tom@tomalrich.com. 

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