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The neuroinvasive potential of SARS-CoV2

ncbi.nlm.nih.gov

141–150 of 298 posts

Re: The neuroinvasive potential of SARS-CoV2

#141
post #113

Earlier quoted context omitted.

I am bookmarking this comment for the time after self-driving cars have become universally available.

given the longevity of webservices online I bet HN is gone before that day happens

HN was founded in 2007, so per the Lindy Effect we should bet on it being around until 2033.

I don't know what your over-under on self-driving cars being prevalent is, so I don't know if this supports your point or not.

Re: The neuroinvasive potential of SARS-CoV2

#142
post #10

From the paper: > If the neuroinvasion of SARS-CoV-2 does take a part in the development of respiratory failure in COVID-19 patients, the precaution with masks will absolutely be the most effective measure to protect against the possible entry of the virus into the CNS. It may also be expected that the symptoms of the patients infected via facal-oral or conjunctival route will be lighter than those infected intranasa…

Yes, only a N95 or better mask would protect you from incoming, as opposed to outgoing, viruses, and these masks are both impractical for everyday wear and need to be conserved for public health users.

This is NOT true. N95 is needed for health professionals in an active care environment. THIS DOES NOT IMPLY MASKS in general ARE NOT EFFECTIVE for individuals in public spaces who may run into someone who’s infected.

Re: The neuroinvasive potential of SARS-CoV2

#143
post #20

Earlier quoted context omitted.

This suggests an advantage to purposeful infection by oral/eye rather than accidental by intranasal. It'll be interesting to see what the case fatality rate is when segmented by infection route.

It's been suggested to me, in addition to hand washing, to use soap to rinse a bit of my nostrils. Not sure if it makes any difference at all, but I've been doing it on the off-chance.

I would think this would actually increase the odds of infection via that route since it would tend to dry out the skin in your nostrils and remove some of the natural defenses we have there.

Re: The neuroinvasive potential of SARS-CoV2

#144
post #118

Earlier quoted context omitted.

Given there's no herd immunity, and the virulance of the strain, estimates are 40-70% of the population will contract the virus within a year 0.2% of 40% of the US Population is 260,000 deaths within a year[1] "it's just the flu" greatly underappreciates just how deadly influenza actually is If the mortality rate is more in the 2%+ range, we're looking at millions of deaths in the US alone. [1] https://www.wolframalp…

I've seen very different estimates. I'm gonna go off on a limb and say that there's probably more misinformation out there than real information. People should remain calm, take [0]reasonable precautions, and make decisions based on the latest information from credible sources such as the [1]CDC - rather than the media. [0] https://twitter.com/eugenegu/status/1235247642814214145 [1] https://www.cdc.gov/coronavirus/20…

The 40-70% number is from a Harvard Professor of Epidemiology

https://www.wsj.com/articles/how-many-people-might-one-perso...

> “I think it is likely we’ll see a global pandemic,” said Marc Lipsitch, a professor of epidemiology at Harvard T.H. Chan School of Public Health. “If a pandemic happens, 40% to 70% of people world-wide are likely to be infected in the coming year. What proportion of those will be symptomatic, I can’t give a good number.”

Re: The neuroinvasive potential of SARS-CoV2

#145
post #57
post #10

From the paper: > If the neuroinvasion of SARS-CoV-2 does take a part in the development of respiratory failure in COVID-19 patients, the precaution with masks will absolutely be the most effective measure to protect against the possible entry of the virus into the CNS. It may also be expected that the symptoms of the patients infected via facal-oral or conjunctival route will be lighter than those infected intranasa…

This is super scary. Before I read this I was happily thinking hey it's no worse than flu. Now... I'm wishing I didn't live in a huge city riding the subway daily.

I don't understand the worry.

As of yesterday, China, a country of 1.4B, had 80,000 cases and 3,000 dead.

Last year, the US had 36M infected with the flu and 34,000 died.[1]

Are you panicking about the flu?

[1]https://www.cdc.gov/flu/about/burden/2018-2019.html

Re: The neuroinvasive potential of SARS-CoV2

#146
post #95

Earlier quoted context omitted.

Why is it easier to get to the brain from the nose compares to the mouth or eyes?

https://en.wikipedia.org/wiki/Olfactory_bulb . however: Yan-Chao Li [etal.] ABSTRACT Swine hemagglutinating encephalomyelitis virus (HEV) has been shown to have a capability to propagate via neural circuits to the central nervous system after pe- ripheral inoculation, resulting in acute deadly encepha- lomyelitis in natural host piglets as well as in experimental younger rodents. This study has system- atically exami…

I don't understand what the Wikipedia link is supposed to show. Your eyes are tightly linked to your brain too.

Re: The neuroinvasive potential of SARS-CoV2

#147
post #57
post #10

From the paper: > If the neuroinvasion of SARS-CoV-2 does take a part in the development of respiratory failure in COVID-19 patients, the precaution with masks will absolutely be the most effective measure to protect against the possible entry of the virus into the CNS. It may also be expected that the symptoms of the patients infected via facal-oral or conjunctival route will be lighter than those infected intranasa…

This is super scary. Before I read this I was happily thinking hey it's no worse than flu. Now... I'm wishing I didn't live in a huge city riding the subway daily.

Learning about the mechanism by which it kills shouldn't change our estimates of the lethality of the disease. We already knew that for most people it was just a bad flue but a noticeable fraction of those infected needed to get to an ICU. Now we just have a better idea of why.

Re: The neuroinvasive potential of SARS-CoV2

#148

As a side observation: most reporting seems rather binary, i.e. you either die or survive, period. What interests me the most, however, is how often survival means full recovery, especially now that the nervous system comes up. Are there any long term effects? Should one generally expect to come out of it worse, the same, or stronger? I'm much less afraid to die from this than to end up with chronic respiratory and/o…

If you're below 50 your chances of dying after contracting the virus are similar to that of being in a car accident if you got in a car over the course of one year (I think a car accident is higher). https://www.worldometers.info/coronavirus/coronavirus-age-se...

I'm not sure exactly how they evaluate risk, but they probably estimate the error based on populations where very few people are studied (probably most people below 50), so it's likely if you're below 50 the chances are actually lower, I'm not sure.

Risk factors for immune disorders and car accidents are probably similar if I were to conjecture (just in: sick people tend to die), so most people on this subreddit will just get the fever. 15% of people don't even present with a fever, so it seems like the immune system can typically fight it off.

Re: The neuroinvasive potential of SARS-CoV2

#149
Whether you believe this or not comes down to whether you believe references 32-34 from the paper. I haven't read the stuff about transgenic expression of human ace2 in mice, but it would sound a lot more like it was aberrantly expressed, so I'm not counting that. "More evidence needed" is the correct interpretation here, I believe.

There's other literature out there saying ACE2 is ubiquitously expressed (including brain) - so that means one of two things: People saying it's expressed everywhere are wrong, or SARS-COV-2 requires more than ACE2 for infection. There are papers saying that transfecting cell lines with ACE2 doesn't always render the cells susceptible, so it's probably a good idea to consider the requirement for a co-receptor.

Like anything, the true answer probably lies in between all these possibilities.

Re: The neuroinvasive potential of SARS-CoV2

#150
post #10

From the paper: > If the neuroinvasion of SARS-CoV-2 does take a part in the development of respiratory failure in COVID-19 patients, the precaution with masks will absolutely be the most effective measure to protect against the possible entry of the virus into the CNS. It may also be expected that the symptoms of the patients infected via facal-oral or conjunctival route will be lighter than those infected intranasa…

Obviously buying masks is discouraged because there is a shortage and hospitals have a much greater need for them than an uninfected person living in location as of yet untouched by the virus. Its about priorities.
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