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Showing posts with label COVID. Show all posts
Showing posts with label COVID. Show all posts

Wednesday, August 26, 2020

COVID-19 August 26, 2020

We are now solidly past the peak of the second wave based on death rate, which has now been slowly decreasing (7-day average).  New cases have also been on the decline.  And now we wait to see if wave #3 emerges as students head back to school.

I read yesterday that hospitals will, once again, be sending their data directly to the CDC instead of HHS.  At this point I'm not sure it matters any more.  The data collection and distribution is so completely screwed up that it may not be possible to conduct meaningful analysis in real time.  It's going to take researchers months or years to dig through the records we do have and sort it all out.  I continue to get my data directly from the states, but just to illustrate how crazy those data are, I refer you to my state of Colorado.  On August 21, Colorado dumped 3,959 new cases into the database in one day.  Clearly, that's a backlog from many, many days (or weeks) prior.  What am I supposed to do with that?  Colorado is not unique.  

I'll be back again in a week or so, or sooner if something changes.  Stay safe out there!








Thursday, August 13, 2020

COVID-19 August 13, 2020

 Rather than posting a rather long narrative, I'm going to drop this article about testing and reporting issues in various states:  https://www.cnbc.com/2020/08/12/accuracy-of-us-coronavirus-data-thrown-into-question-as-decline-in-testing-skews-drop-in-new-cases.html
 

Things are a real mess.  Actually, things are FUBAR.  While everyone is/was worried about the federal government fudging numbers after bypassing the CDC, the real story, I think, is at the state level.  The daily case numbers and total cases are becoming increasingly meaningless with time.  The death rate is still more robust, but that's a relative assessment.  How many different ways and our local, state and federal governments fail us?  





 

Wednesday, August 12, 2020

COVID-19 August 11, 2020

Wave number two is leveling off.  Sort of.  New daily cases have been dropping since about July 19.  Within the last week that trend has stopped and we've reached a plateau.  We'll have to wait and see if that's a temporary pause, whether we'll continue down, or whether we'll start on a wild ride up again.  Interestingly, California came in with big numbers yesterday: 12,500.  That's the highest number since July 22.  It's just one day, so it may not mean anything.  It's something to watch, however. I'll also be watching what happens as kids return to school.

The death rate dropped last week around the time the hurricane threatened Florida and when Texas switched to a new reporting system.  You can see the drop in numbers around day 212.  After that it plateaued.  This is an odd behavior, but it could be related to Texas and Florida numbers catching up.  We will have to see if this is a temporary pause or whether we're about to go up or continue down. I expect deaths to mirror the new cases with a lag of about three weeks.  To see deaths plateau around the same time as the new cases, with effectively no lag, is odd.





 

Friday, August 7, 2020

COVID-19 August 07, 2020

It looks like the death rate has peaked, but there's a caveat.  The peak coincided with the data anomaly that was likely caused by hurricane in Florida and the reporting system upgrade in Texas.  To my eye, there has yet to be compensation for the data that went missing earlier this week.  You can see the effect in the daily new cases (on the linear scale).  There's a big dip noticeable just a few days ago, but there has not been a reciprocal rebound.  There's a similar signal in the daily death rate, and it has caused a downward offset in the 7-day average. New cases peaked around July 19, so the timing of the peak in deaths is a bit early based on prior lags of about 3 weeks.

Reporting issues aside, it does appear that when masks and social distancing programs are in place it can have a noticeable impact. And the opposite is true.  When all caution is thrown to the wind the numbers can explode.  It's going to get interesting as schools open across the country with varying amounts of precautions in place.  We are suddenly going to have a large segment of the population mixing it up (for those places where school is physically going back into session) like we've never had before.  Other countries have run this experiment to varying degrees with not-so-good results. 







Tuesday, August 4, 2020

COVID-19 August 04, 2020

Apologies again for my inability to post daily.  I do have a day job.  This is all mostly morbid and self-preserving curiosity, but I don't get paid for it.

Back when the Feds ordered a change in data reporting I noted that the data itself would likely show if there was any funny business.  Well, I'm not saying there's funny business, but things don't look quite right.  It could be real. It could be data problems not related to the CDC circumvention, or it could be monkeying around.  I can't tell, and either can you.  At least not yet.  I'm loathe to initiate or validate conspiracies, but I think some skepticism is warranted. 

New cases reported over the last two days were down.  This is consistent with the general downward trend that's been established for well over a week, and it's also consistent with the weekly oscillation, which is usually near the bottom on Sunday and Monday.  What's shocking is just how down it is. It's a very large drop that appears to my eye to be out of family with pretty much all the data since this mess began. Yesterday's total came in at 41,963.  The day before it was 53,561. It's been a month since numbers have been that low, and the drop from the max is far faster than anything we've seen.

Digging into the numbers and individual states a bit more, I went straight to Florida, Texas, and California since these "big three" have been driving the numbers of late.  Texas is on the decrease, but the numbers don't appear to be too out of place compared to the previous week.  For example, last week they bottomed out with 5,810 and 4,267 compared to this week's 6,226 and 5,303.  Both this week and last week are down compared to the prior weeks, but this week doesn't stand out as being anomalous compared to last week.  The same goes for California.  It's down, but not in any obviously odd way compared to the prior week.

And then there's Florida.  Yesterday's number came in at 4,752.  I've cautioned before about looking at individual daily numbers by themselves.  That missive still holds.  But, let's compare that number in the context of the prior number from a week ago: 8,892.  It's down by almost a factor of two compared to last week.  In fact, Florida hasn't reported a number this low since June 23. 

If I then move to some of the other smaller population states, I start to see at least some things that jump out at me.  Tennessee is somehow down by something over 50% in a week.  Arizona, down by something like 50%.  Missouri, down by 40-50% depending on how you do the accounting.  And so on, in several other states.  It just looks odd.  Could be real. Or not.  I think we need to wait and see how things continue to trend and then wait for an explanation from those that do this sort of thing for a living.

Deaths have shown a similar, large drop over the last couple days.  It's a bit unexpected, but compared the amplitude of prior oscillations it's large but not necessarily unrealistic.  It has caused the 7-day average to drop noticeably over the last two days. Death numbers are harder to fudge than infections, but it's not impossible.  All it takes is a reclassification of a COVID death to be something else.  The dead are almost always counted, but not necessarily properly binned.

What's driving the drop in deaths? To start with Texas failed to report at the end of the day on August 2.  From a statistical standpoint, that shows up as a zero.  I might have expected yesterday's number to come in higher to account for that non-report, but it didn't.  Where did those deaths go?  Will they show up in the next few days?  That's a lot of dead people gone missing. If I were to add back in a couple hundred deaths to Texas, things start to look more consistent with the prior trends.  The numbers for Florida are down for the last two days (as expected due to the oscillation) and are comparable to where they were a week ago.  Same with California.  So, this could all be a statistical aberration.  But, at some point, we should be asking to where the Texas dead disappeared.









Sunday, August 2, 2020

COVID-19 August 02, 2020

It's been a busy week.  Apologies for the spotty posts.  Here are the data based on yesterday's numbers.  New infections are continuing to slowly drop, but remember we are still nearly double where we were when wave #2 began.  Deaths continue to increase.






Friday, July 31, 2020

COVID-19 July 31, 2020

No time for commentary today, but here are the pretty pictures.






Thursday, July 30, 2020

COVID-19 July 30, 2020

The number of new cases has now clearly started to trend downward.  That's driven largely by the data coming from Florida, California, and Texas which were responsible for the bulk of the second wave.  However, there are still many states that are going up, up, up.  These smaller states are getting washed out. 

Deaths continue to increase.  If there's any good news, it is that in two weeks or so we might expect those numbers to level off and then start to decrease since there is (or should be) a direct link between cases and deaths. 






Sunday, July 26, 2020

COVID-19 July 26, 2020

A short post today because it's the weekend and I've got work, yard work, and BASEBALL to watch.  There's nothing really new anyway.  New infection rates continue to hold steady. Deaths continue to increase.  Your state may vary. 






Saturday, July 25, 2020

COVID-19 July 25, 2020 : COLORADO SPECIAL

It's been a while since I did a "Colorado Special".  I figured this might be a good time, especially since decisions need to be made about sending kids back to school. 

The 7-day average daily infection rate is higher than ever in Colorado, and the trend indicates a continued increase.  Some caution needs to be exercised with this statement.  First, testing is much higher now that it was early on.  All other things being equal, the number of identified infections should go up even if the actual infection rate were the same.  At the same time, Colorado started reporting only confirmed cases (i.e., positive tests) rather than confirmed plus presumptive on April 25.  This is why there is a big discontinuity in the daily infection data at that date.  See the big downward drop?  I've circled it in red. Even so, it didn't take more than a couple of weeks for new infections to go above and beyond the numbers prior to the change.  I'll also add that I personally know some people in the state that have been waiting for almost three weeks to get test results.  Many that were infected weeks ago won't show up in the stats until the tests come back. 

Around May 5th, the daily infections began to drop fairly steadily.  We were in the height of the lock-down and it worked.  Then, around June 14 the numbers began to climb.  This coincides, roughly, with the loosening of restrictions.  Shocking, I know.  It's almost as if...as if science works.  Who knew?  Colorado numbers are going up even though the 7-day average for the country has stabilized in the last week.  Be careful with averages.  Even in Colorado, the trends in counties and cities can be extremely different. 

I'll make this point explicit:  Cases are increasing even though we haven't yet sent thousands and thousands of students and staff back into enclosed buildings for 7 hours per day.  You do the math.  If anyone is wondering, I'm keeping my high-schooler at home; he will be attending via an on-line school option.  I'm lucky that my school has provided this option.  We do have the option to send the kids back to school on a hybrid system that includes both in-class (50% of the time) and on-line (50% of the time) instruction.  I'm fortunate that I'm in a position to do the on-line option.  Not everyone can.  Some will be forced to send their kids into the grand petri dish experiment because they have to work or for other reasons.  Who will be held responsible if this all goes horribly wrong? 

The 7-day average death rate bottomed out around July 4.  It was darn near zero.  Since that time, the death rates have been climbing.  This is expected given the increase in infections and the lag between an infection and death.  As cases increase and hospitals begin to get filled again, deaths should also increase.  If there's any good news it's that medical professionals have learned a lot about how to best treat the infections with the tools at hand.  No doubt that many who would have died in March and April will survive because of improved treatment options.