(Washington) — The actual number of coronavirus infections in the U.S. reached nearly 53 million at the end of September and could be approaching 100 million now, according to a model developed by government researchers.
The model, created by scientists at the Centers for Disease Control and Prevention, calculated that the true number of infections is about 8 times the reported number, which includes only the cases confirmed by a laboratory test.
https://www.witf.org/2020/11/27/governm ... 0-million/
This would fall right in line with the infection fatality rate sitting around 0.3% which is the latest number I've heard in a couple different places.
So...almost 100 million cases, that's like 30% of the country. 40 million + cases over the past two months. That's disappointing.
Looking ahead, if the cases continue at 25 million cases per month +/-, we'll be at 200 million cases by the end of March.
No one knows if cases will continue at that rate. On the one hand, the more people have it, the quicker it spreads and gets into exponential growth very quickly. So, it's entirely possible (probable really) that the rate of infection goes up quickly here after the Thanksgiving holiday. At the same time, 30% have been infected?
If so, and if exposure to the virus prevents serious disease or even infectiousness, it's plausible the rate starts to decrease at some point as well.
This conversation needs to happen, so I'm just going to bring it up.
The vaccine is introducing the spike from the sars-cov-2 virus to the body in order to generate an immune response. This is something that occurs in natural infections as well. I don't see any reason at this point we shouldn't lump naturally infected people in with those vaccinated when accounting for....HERD IMMUNITY, everyone's favorite topic.
First, it's not proven if infection or vaccine prevents infectiousness and as such this entire conversation may be moot. But,let's assume both those naturally infected and those that are vaccinated become immune long term from serious covid (requiring hospitalization) and avoid becoming infectious. Big assumptions, but there's really no point discussing anything if it's not true, we'll just continue to live with covid killing hundreds of thousands of people a year perpetually.
The clinical equation for herd immunity is R effective -1 divided by R effective. R effective is 3ish, so herd immunity is at 67%ish. This isn't meant to be exact, just back of the napkin calcs to understand what's coming if the above assumptions are valid. If so, we're going to start reaching that number in Marchish as the vaccine rolls out and natural infections continue. It should be noted as i think mikechamp posted an article to earlier, herd immunity isn't a black/white simple equation. Even at 67%, the virus doesn't drop dead, it represents a point where spread slows to a point where the instantaneous R transmission value drops below 1 meaning it will eventually fade away even with no restrictions. Still, since people can still contract it, it's not like 67% then party.
Getting back to the number of cases which accoridng to the article/CDC model is ~100 Million and we're increasing at a rate of new infections of 20-25 Million a month, that's 200M ish at the end of March.
Add in the vaccines which is 10M this year then just say an additional 40M in the first three months of next year. That's 50M, you can probably say 40% (?) of those receiving it will have already been exposed and accounted for in the numbers above so that's 30M that can be added to the herd. It's possible by the end of March we'll be at 230M people (69%) that have either been infected or vaccinated (20M of which will have been both infected and vaccinated).
Which brings me to my next point, given that all a vaccine is doing is introducing the spike protein to the body to create an immune response, wouldn't it make a lot of sense in limited supply to test recipients for either antibodies or some other markers (whatever is quickest) before vaccinating those people?
All that to say, I have no idea what the next 4-6 months holds in store, there are reasons to be petrified if exponential growth really kicks in over the holidays and we see massive outbreaks that overrun the hospitals. But, if the vaccine is the savior, it's likely those that have been naturally infected are a part of the solution as well.
If not, covid's going to be around forever and we're all [expletive]. Even if we hit 230M people immune by April of 2021, that's still 100M plus people vulnerable and restrictions will carry for some period of time, probably through 2021 until everyone has had a chance to be vaccinated.