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The six strains of SARS-CoV-2:
"The SARS-CoV-2 coronavirus is presumably already optimized to affect human beings, and this explains its low evolutionary change," explains Federico Giorgi, a researcher at Unibo and coordinator of the study. "This means that the treatments we are developing, including a vaccine, might be effective against all the virus strains."
Currently, there are six strains of coronavirus. The original one is the L strain, that appeared in Wuhan in December 2019. Its first mutation—the S strain—appeared at the beginning of 2020, while, since mid-January 2020, we have had strains V and G. To date strain G is the most widespread: it mutated into strains GR and GH at the end of February 2020.
Globally, strains G, GH and GR are constantly increasing. Strain S can be found in some restricted areas in the U.S. and Spain. The L and V strains are gradually disappearing.
Journal Reference:
Mercatelli, Daniele, Giorgi, Federico M.. Geographic and Genomic Distribution of SARS-CoV-2 Mutations, Frontiers in Microbiology (DOI: 10.3389/fmicb.2020.01800)
(Score: 1) by khallow on Wednesday August 05 2020, @01:06AM (20 children)
I could be mistaken, but last I checked, covid doesn't have a 100% fatality rate. So it indeed doesn't kill the host plenty of times.
(Score: 2) by barbara hudson on Wednesday August 05 2020, @01:15PM (19 children)
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(Score: 2) by krishnoid on Wednesday August 05 2020, @07:34PM
So *that*'s why there are so many dog and cat videos on Youtube! That explains it. Doesn't explain the influencers, though.
(Score: 1) by khallow on Wednesday August 05 2020, @11:57PM (2 children)
How do they propagate? An infectious agent has to divert resources from the host in order to spread. And the less resources it diverts, the less likely any opportunity to spread to another host succeeds.
(Score: 2) by barbara hudson on Thursday August 06 2020, @01:03AM (1 child)
Mitochondria have their own DNA independent of the host organism, which is why most biologists believe that they started off as independent bacteria. All those bugs help us survive, digest food, etc, so we are the agents for transmission from one host to another. They are literally along for the ride, not having to expend any effort or energy to "infect " a new host.
When powerful antibiotics deplete your gut bacteria, for example, you're advised to eat lots of yoghourt to restore them. Depleted natural micro flora in the vagina creates an environment ripe for yeast infections. Depleted skin bacteria leaves a surplus of fatty acids on your skin, making your perspiration stink.
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(Score: 2) by barbara hudson on Thursday August 06 2020, @01:11AM
SoylentNews is social media. Says so right in the slogan. Soylentnews is people, not tech.
(Score: 0) by Anonymous Coward on Thursday August 06 2020, @01:01AM (14 children)
Specifically name one or more viral strains that meets your criteria.
(Score: 2) by barbara hudson on Thursday August 06 2020, @03:23AM (13 children)
see story [huffingtonpost.ca]. I saw a CBC documentary on this last month.
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(Score: 0) by Anonymous Coward on Thursday August 06 2020, @04:18AM (12 children)
So you can't name a specific virus strain or you chose not to?
Regardless, bacteriophages kill their hosts. It is literally in the name.
(Score: 2) by barbara hudson on Thursday August 06 2020, @05:53AM (11 children)
If you don't drink sewage- contaminated water, you don't get the bacteria in the sewage or the phages that live off those bacteria. Drink the contaminated water, hopefully you get enough of the viruses that naturally feed off those bacteria to help get them under control in your body. It's why we look in sewage contaminated with human waste for phages to kill off bacteria when antibiotics don't work. You want phages that are naturally at home in humans and that won't attack the host or provoke an immune response.
It would probably take until the sun goes Nova to discover and name a significant fraction of them. Good luck with that.
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(Score: 2) by barbara hudson on Thursday August 06 2020, @06:01AM
SoylentNews is social media. Says so right in the slogan. Soylentnews is people, not tech.
(Score: 0) by Anonymous Coward on Thursday August 06 2020, @09:27AM (9 children)
Call me names when you apparently don't even know what a viral host is? I guess that is your usual way to show you are out of your depth.
(Score: 2) by barbara hudson on Thursday August 06 2020, @11:36AM
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(Score: 2) by barbara hudson on Thursday August 06 2020, @05:24PM (7 children)
If you couldn't host all the bacteria in your gut you'd suffer from multiple deficiencies. The bacteria benefit from free food in a friendly warm cozy environment. So symbiosis.
A tape worm in your gut, on the other hand, is parasitic - unless your goal is to eat everything in sight and still lose weight, but you'd still suffer from malnutrition.
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(Score: 0) by Anonymous Coward on Thursday August 06 2020, @08:03PM (6 children)
Introduction to the Viruses [berkeley.edu] might be helpful for you to get the basics. You may want to pay special attention to their use of "host" in relation to viruses.
(Score: 2) by barbara hudson on Thursday August 06 2020, @10:30PM (5 children)
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(Score: 0) by Anonymous Coward on Thursday August 06 2020, @11:19PM (4 children)
Don't be intentionally obtuse. The meanings I gave are current usage for virology.
(Score: 2) by barbara hudson on Friday August 07 2020, @01:50AM (3 children)
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(Score: 0) by Anonymous Coward on Friday August 07 2020, @04:59AM (2 children)
Cool, but that is not a medical dictionary nor is it free to access. But the Harvard Medical Dictionary defines a host as "host: A person or other living organism that can be infected by a virus or other pathogen under natural conditions." Bacteriophages don't infect people because an infection is "The growth of harmful organisms that can cause disease, such as bacteria, in the body." But they do cause disease in the bacteria because those are the viruses' hosts.
(Score: 2) by barbara hudson on Friday August 07 2020, @12:15PM (1 child)
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(Score: 0) by Anonymous Coward on Friday August 07 2020, @10:11PM
Don't be willfully stupid. We were talking about bacteriophages and the bacteria hosts.