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SARS-CoV-2 501Y.V2 escapes neutralization by South African COVID-19 donor plasma

biorxiv.org

31–40 of 131 posts

Re: SARS-CoV-2 501Y.V2 escapes neutralization by South African COVID-19 donor plasma

#31
Question: How would this affect severity? My basic understanding is because this is a new virus humans have very little existing immunity, which is the problem and why we don't die from colds. Over time our bodies get better at dealing with the virus and the virus gets better dealing with us.

I read a paper on hn to this effect a little while ago, I'll provide source if needed.

Re: SARS-CoV-2 501Y.V2 escapes neutralization by South African COVID-19 donor plasma

#33
post #11

If we can expect more surprises like this, movement will have to be curtailed till we’re sure we have things under control (like SARS). We can’t have the whole world economy in lockdown because a new strain spread because prior immunization is ineffective against the variant.

If you COORDINATE lockdowns and everyone works in harmony they can be very short.

You could even schedule them in advance.

Re: SARS-CoV-2 501Y.V2 escapes neutralization by South African COVID-19 donor plasma

#34

I for one am not concerned. The true mortality rate appears to be 65. What does that mean? To put it into perspective you may only know one person in your friend group which knows one person who dies. Your friends / family are more likely to die of cancer. How often do you know someone die of cancer? It's definitely unfortunate; we should all socially distance & wear N95's where possible. All of us can decide if we w…

> How often do you know someone die of cancer?

That depends on how many smokers and ex-smokers you know. It makes it all the sadder because the death was preventable. Which puts it into a similar headspace with Covid.

Re: SARS-CoV-2 501Y.V2 escapes neutralization by South African COVID-19 donor plasma

#35
post #24
post #5

Pulling directly from TFA, > Here we show that this lineage exhibits complete escape from three classes of therapeutically relevant monoclonal antibodies. Furthermore 501Y.V2 shows substantial or complete escape from neutralizing antibodies in COVID-19 convalescent plasma. These data highlight the prospect of reinfection with antigenically distinct variants and may foreshadow reduced efficacy of current spike-based v…

exiting discussion

It will never be the new normal and there ate no reasons for it to be.

Re: SARS-CoV-2 501Y.V2 escapes neutralization by South African COVID-19 donor plasma

#36
The current headline (“strongly resistant to past immunity”) is editorialized and not what the research here shows. It’s resistant to donor antibodies, which is definitely unfortunate and concerning, but there’s more to immunity than just antibodies, and even more to antibodies than just the ones donated. Preliminary research [1] shows that vaccines are still effective, at least, and likely that implies natural immunity is still effective too.

[1] https://www.biorxiv.org/content/10.1101/2021.01.15.426911v1

Re: SARS-CoV-2 501Y.V2 escapes neutralization by South African COVID-19 donor plasma

#37

Interesting... the common cold and the flu also tend to mutate to be resistant to past immunity. I wonder if we’re on a the cusp of finally finding cures for these types of rapidly mutating viruses.

Or you could just wear a mask and social distance and not congregate indoors with random strangers for long periods of time

Re: SARS-CoV-2 501Y.V2 escapes neutralization by South African COVID-19 donor plasma

#38

Worth noting that this study isn't peer reviewed yet.

Worth noting that peer review is also a bit (or a lot slow) and not perfect, and that all peer-reviewed studies have in the past been not peer reviewed.

indeed. The replication crisis occurred in peer review media.

Re: SARS-CoV-2 501Y.V2 escapes neutralization by South African COVID-19 donor plasma

#39
Please note, that neutralization by antibodies is only one of the many possible ways how our immune system can take action. Antibody recognition is still possible with the found mutant:

"To determine whether 501Y.V2 is still recognized by non-neutralizing antibodies, the binding of polyclonal sera (from Fig.2a) to a recombinant 501Y.V2 RBD+SBD1 protein and an RBD+SBD1 from the original lineage was assessed by ELISA (Fig.2b). These data revealed that binding of polyclonal plasma to 501Y.V2 RBD+SBD1 was only substantially affected in a minority of cases (14 of 44 with ≥five-fold reduction, 32%). Most of the convalescent plasma/serum suffered less than four-fold reductions in total binding activity (as measured by area under the curve), suggesting a considerable non-neutralizing antibody component are still able to bind the 501Y.V2 spike antigen"

Its also worth to note that only 44 plasma samples were used from individuals out of a population where the virus probably originated.

Re: SARS-CoV-2 501Y.V2 escapes neutralization by South African COVID-19 donor plasma

#40

Worth noting that this study isn't peer reviewed yet.

Worth noting that peer review is also a bit (or a lot slow) and not perfect, and that all peer-reviewed studies have in the past been not peer reviewed.

None of which invalidates the importance of peer review. If anything, it means that more should be taking place.
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