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Evaluating necessity of Covid-19 vaccination in previously infected individuals

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Re: Evaluating necessity of Covid-19 vaccination in previously infected individuals

#341

Post by spfzero »

tomerico wrote: post #19
Taniwha wrote: post #16

Earlier quoted context omitted.

However there already exist real people in the world who have had Covid twice, and who reportedly have had a much tougher time the second time around. This study helps us put some bounds on how many people this might happen to (assuming there are no mutations to the virus) but it doesn't rule it out completely, because of the prior existence proofs

If this is rare enough, it could fall into the false positive rate of the COVID test they've previously done (i.e. while the test said they had COVID, they didn't)

Certainly the case with the PCR test, because it is so sensitive. It can detect Covid fragments at such a low level that no symptoms would show and no adaptive immune response would arise. That's not enough Covid to generate memory and immunity.

You could be PCR tested positive, while experiencing a cold or flu (which you would now understandably think were Covid symptoms), but would not have immunity for a future, larger infection from Covid.

Though statistically unlikely, it's bound to happen sometimes.

Re: Evaluating necessity of Covid-19 vaccination in previously infected individuals

#342

Post by kbelder »

adventured wrote: post #113
symlinkk wrote: post #39

Earlier quoted context omitted.

Because openly stating this obvious fact would get you downvoted on here a few months ago.

> Because openly stating this obvious fact would get you downvoted on here a few months ago. Attempting to discuss it here will still commonly get you downvoted. HN is not a particularly rational forum. People make the mistake of thinking it is because a lot of engineers hang out here. Engineers are not especially rational, that's a common myth derived from failing to understand the way people mentally compartmentali…

My favorite was when they uncritically accepted China's claim of reducing infections to nearly zero within a span of a few weeks. (5,000 per day to 50 per day in four weeks).

That's so unlikely it's laughable, but it's widely reported and accepted.

Re: Evaluating necessity of Covid-19 vaccination in previously infected individuals

#343

Post by andrei_says_ »

whoknowswhat11 wrote: post #205
stavros wrote: post #98

Earlier quoted context omitted.

It's even worse than that, my dad got it in an indoor space (office) while both he and the carrier were wearing masks. Then I got it from him in the house, even though I avoided him and kept my distance. He wouldn't wear a mask in the house (because "I'm fine") and kept coughing up the place, though.

You need to be very very clear about the type of mask you are wearing. I wear an N95 or KF94 - I like the ones with the valve / vents so do a surgical over that if I use one of those. I've got friends in covid care who had pretty high exposure with a good N95 and face shield without being infected. So when people say they were masked up and got infected, you need to ask, was this just some fleece cloth or a mask desi…

I think it’s safe to presume that it’s a non-sealing, cloth mask as that’s what 99% of us “civilians” are using.

Even these slow down transmission so it’s a function of having a mask, time spent together, flow/amount of air, proximity.

Re: Evaluating necessity of Covid-19 vaccination in previously infected individuals

#344

Post by sschueller »

daenz wrote: post #128

Why is it that so many people seem to be biased against evidence that our immune systems do a pretty good job? It's as if they want the vaccine to be the only thing that helps stop COVID.

This seems to be a US thing at least at the moment.

Here is Switzerland the government specifically says if you have had a positive Corona test you should not vaccinate for at least 6 month and if you do after that only 1 shot not 2.

Then again we had a vaccine shortage so that may also have something to do with it.

Re: Evaluating necessity of Covid-19 vaccination in previously infected individuals

#345

Post by CogitoCogito »

whizzter wrote: post #241
qrybam wrote: post #235

Earlier quoted context omitted.

That’s interesting. Maybe the duration of the trial was too short or sample size too small, because I know two people personally who were re-infected pre vaccination.

Maybe too short, but also Covid-19 isn't really just one disease anymore, but rather a family of strains. Just yesterday the news had an article about how a national level soccer player for Sweden who had been infected previously in the past managed to get infected again and infect parts of the team. The player in question had been infected about a year ago initially (before the British strain was found) and with the…

I'm living in Sweden and my girlfriend has been infected twice about a year apart. So yeah it seems like the passage of a year and the combination of new strains is enough for this to happen. Also unfortunately her second case was definitely worse than the first (which wasn't exactly fun either). It's a shitty disease.

Re: Evaluating necessity of Covid-19 vaccination in previously infected individuals

#346

Post by thehappypm »

cuchoi wrote: post #109
briefcomment wrote: post #96

Earlier quoted context omitted.

Most authorities are downplaying natural immunity, despite evidence like this. The more widely this spreads, the more people will realize it's ok to rely on natural immunity, and to not blanket demonize those who are unvaccinated.

My wife and I got COVID twice 9 months apart last year. The second time my wife ended up in the hospital. We both got vaccinated as soon as we could.

You really shouldn't be saying this on public forums without proof. You have no proof that the first infection wasn't the flu or a bad cold. The odds of reinfection are very small, and the odds of both of you getting reinfected is vanishingly so. Without proof this is potentially fear mongering.

Re: Evaluating necessity of Covid-19 vaccination in previously infected individuals

#347

Post by mixmastamyk »

Reason077 wrote: post #242
mixmastamyk wrote: post #232

Earlier quoted context omitted.

Did you also have a super-dry cough and/or an irritation in the lungs bordering on a burning feeling? That was like no other illness in my experience.

I didn't have any burning sensation. More like a sort of tingling discomfort, and the "shortness of breath" feeling where I'm breathing normally but it doesn't feel like you're getting the normal amount of oxygen from each breath? Also I never really had that much of a cough. Just a mild, intermittent dry cough.

Thanks. Yes, a week later I was really out of breath walking at a slight incline, similar to being at high altitude, such as 5,000 meters.

Re: Evaluating necessity of Covid-19 vaccination in previously infected individuals

#348

Post by ping_pong »

f6v wrote: post #236
ping_pong wrote: post #224

Earlier quoted context omitted.

Why are you quarantined if you got vaccinated?

Keep in mind that vaccine is not 100% effective.

The measles vaccine is less effective than the COVID vaccine, and for mumps is less than 90% effective. Are you going to quarantine yourself over those lowered percentages? Most vaccines are less effective than the COVID vaccine.

To not trust vaccination is to not trust science.

Re: Evaluating necessity of Covid-19 vaccination in previously infected individuals

#349

Post by SkyPuncher »

ping_pong wrote: post #224
SkyPuncher wrote: post #127

Earlier quoted context omitted.

> to not blanket demonize those who are unvaccinated. Well, I'm currently in quarantine from my 4 month old and wife because an acquaintance refused to get vaccinated. "young people don't die from COVID" type mentality. I attended my brother's bachelor party - of which we all thought everyone was vaccinated. Turns out this person, not only refused to get vaccinated - but had COVID exposure and still decided to attend…

Why are you quarantined if you got vaccinated?

Data indicates actual effectiveness as about 91.5%.

However, that's across the population. Factors like extended contact period increase viral load intake, could further decrease the effectiveness. Since my 4 month old can't get vaccinated against COVID yet, we decided it wasn't worth taking the risk.

Re: Evaluating necessity of Covid-19 vaccination in previously infected individuals

#350

Post by glenneroo »

andrei_says_ wrote: post #343
whoknowswhat11 wrote: post #205

Earlier quoted context omitted.

You need to be very very clear about the type of mask you are wearing. I wear an N95 or KF94 - I like the ones with the valve / vents so do a surgical over that if I use one of those. I've got friends in covid care who had pretty high exposure with a good N95 and face shield without being infected. So when people say they were masked up and got infected, you need to ask, was this just some fleece cloth or a mask desi…

I think it’s safe to presume that it’s a non-sealing, cloth mask as that’s what 99% of us “civilians” are using. Even these slow down transmission so it’s a function of having a mask, time spent together, flow/amount of air, proximity.

The outlier being Austria where everyone is required to wear FFP2 (N95 equivalent) masks when indoors (shopping, public transport, etc). And the government mandated the price of masks to be less than 1 Euro each. Not to say they are handling things great, but that was at least one step in the right direction.
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