COVID-19 — Coronavirus

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domalino said:
Passive immunity from transferred antibodies only lasts a few weeks or months. The most commonly studied form of this is antibodies passed to babies through plasma in womb or through breast milk. Generally it keeps you safe for 3 months.

Chickenpox is the example everyone is given, if your mum had chickenpox, the antibody is passed to you before birth and lasts <6 months.

But if you're giving transfusions to people fighting covid, they will be producing their own antibodies as well, which will last much longer and the antibodies from the plasma transfusion are there to make sure you keep the virus under control while your body responds to the virus itself.
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Yeah I wasn’t talking about plasma antibodies, sorry if I confused things.
 
BlueAnorak said:
Au contraire. Antibodies = Immunity. They are one on the same. Plasma from survivor passes antibodies from survivor to the ill.[/QUOTE. How i read what you wrote was it stops them from needing life support by giving them antibodies,surely that is about giving them extra antibodies to help them fight the currently illness,it doesn't promise any immunity,all countries are finding the immunity question a difficult one and there are cases of a second infection

I have seen scientists here and in the states that the antibody tests they using are good enough for surveying the population but that they would not given any patient any advice on immunity based on those tests,immunity,whether you have it,how strong it is and for how long is not solved yet

Also they are finding a lot of antibody tests that claim to work are no better than guessing,there isn't anyone who is going to say you are immune and you get get a passport of immunity as was talked about a while ago


“The immune response to Covid-19 is not yet understood,” the Centers for Disease Control and Prevention (CDC) explains. “Patients with MERS-CoV infection are unlikely to be reinfected shortly after they recover, but it is not yet known whether similar immune protection will be observed for patients with Covid-19.”
While further studies are needed to understand whether it is possible for an individual to be reinfected with new coronavirus, experts recommend those who have been infected follow the hygiene steps outlined by CDC, which include staying away from people who are sick, frequently washing hands, and covering coughs and sneezes.

https://www.independent.co.uk/life-...id-19-twice-sick-spread-relapse-a9400691.html
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Many are hinging their hopes of reopening society and getting back to work on a so-called immunity 'passport' that means they have had the virus, recovered from it and cannot be reinfected because of antibodies in their blood,but none of the dozens of tests being rushed through production and scaled up around the world are full-proof. Some are not sensitive enough to detect the antibodies and some cannot differentiate them from antibodies against other illnesses


https://www.dailymail.co.uk/news/ar...VID-19-antibodies-not-guarantee-immunity.html
 
I - personally - would pay for a vaccine for the common cold, and I doubt I'm the only one. The problem is however that there are something like five specific rhinoviruses in circulation. No-one is going to want an expensive vaccine for 1 or 2 out of the 5.
 
@karen7
You put the response inside the quote.
They are not 100% sure but they are pretty sure. The issue is with those who produce very few antibodies as they may be able to catch it again within a few months. Not good for herd immunity.
 
SWP's back said:
If having antibodies doesn’t give anyone immunity, then there will never be a cure. So herd immunity won’t ever be achieved via vaccine or it “washing through” the population and it will become the new number one killer of people over the age of 60.

I’m still very circumspect on anything WHO says at the moment as they’ve not exact been clear or correct on everything thus far.
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What have they got wrong?

A vaccine - if it works - will give immunity to most, as does the annual flu vaccine. Add in some ameliorative treatments (other than injecting Dettol) and it need not be the number one killer of anybody.
 
chesterbells said:
Yep, we’re looking at an era of much shorter average life expectancy and higher death rates for the species in that case aren’t we?
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(a) not if there's an effective vaccine
(b) given the "underlying conditions" problem, and that the number of deaths is (statistically) low - most people don't catch it, and most who do survive), "much shorter" may be pessimistic - though we don't know what long-term health effects may be (even on those who didn't have respiratory infections).
(c) (arguably) - mutations tend to weaken a virus
 
Vic said:
What have they got wrong?

A vaccine - if it works - will give immunity to most, as does the annual flu vaccine. Add in some ameliorative treatments (other than injecting Dettol) and it need not be the number one killer of anybody.
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A vaccine won’t work IF antibodies don’t give immunity. Can’t be any plainer than that.
 
Vic said:
(a) not if there's an effective vaccine
(b) given the "underlying conditions" problem, and that the number of deaths is (statistically) low - most people don't catch it, and most who do survive), "much shorter" may be pessimistic - though we don't know what long-term health effects may be (even on those who didn't have respiratory infections).
(c) (arguably) - mutations tend to weaken a virus
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a) When I said “in that case” I meant in the case there’s not an effective.
b) you are saying the deaths are statistically low, but I’m not sure in the over 70s that’s the case, and in mind a UK life expectancy of what was it, 81, then I would stand by the view It could significantly reduce life expectancy.
c) OK - arguably ;-)
 
chesterbells said:
a) When I said “in that case” I meant in the case there’s not an effective.
b) you are saying the deaths are statistically low, but I’m not sure in the over 70s that’s the case, and in mind a UK life expectancy of what was it, 81, then I would stand by the view It could significantly reduce life expectancy.
c) OK - arguably ;-)
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Perfect for governments that not long ago were complaining people were living too long and they would struggle with healthcare and pension costs. Funny that.
 
SWP's back said:
No, it makes it impossible.
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How so? We're working in the dark to some extent, but (a) some people do appear to be immune (at least have been exposed without showing symptoms) and (b) vaccination of a different virus might protect against this virus. (What is it that means some people don't catch it? That was the question that led Jenner to discover a smallpox vaccine.)
 
Vic said:
How so? We're working in the dark to some extent, but (a) some people do appear to be immune (at least have been exposed without showing symptoms) and (b) vaccination of a different virus might protect against this virus. (What is it that means some people don't catch it? That was the question that led Jenner to discover a smallpox vaccine.)
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Jenners vaccine worked as the antibodies produced recognised smallpox and killed it off. Once you’ve had cow pox or smallpox or a vaccine for either then you have lifelong immunity.

Vaccines work by making your body produce antibodies (as if they’ve had the real thing). Those antibodies then recognise and destroy the virus.

What the WHO are saying is that there is no evidence as of yet that having recovered from CV19, you can’t catch it again. If that is the case, then therefore antibodies don’t matter and therefore a vaccine wouldn’t work.

*please note that I don’t believe WHO on this. I do think there will be a viable vaccine and I do think cv19 survivors, who have produced antibodies, will be immune. I think tenure being over cautious having gotten CV19 wrong at the outset.
 
Vic said:
How so? We're working in the dark to some extent, but (a) some people do appear to be immune (at least have been exposed without showing symptoms) and (b) vaccination of a different virus might protect against this virus. (What is it that means some people don't catch it? That was the question that led Jenner to discover a smallpox vaccine.)
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Nobody in the world had immunity to this,it is a new virus,whether you have no or mild symptoms is no different to anyone getting really sick in terms of immunity,no country doing their own research will commit to immunity at the moment
 
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