Live data from Hacker News

The mutation that helps Delta spread

nature.com

121–130 of 641 posts

Re: The mutation that helps Delta spread

#121
post #58

Earlier quoted context omitted.

Yes the J&J shot still works using only the spike protein. IIRC only Novavax uses traditional inoculation of using the weakened SARS-CoV-2 virus.

weakened how?

Some of the current vaccines are produced by mixing batches of SARS-CoV-2 virions with beta-Propiolactone to make them inactive.

Re: The mutation that helps Delta spread

#122
post #82
post #53

Earlier quoted context omitted.

Herd immunity happens long before we are all infected. Less than 40% of the US population is completely unvaccinated, which means we can open up more without overwhelming hospitals. That does put the unvaccinated at increased risks, but the general public is seemingly unwilling to continue lockdowns to protect people choosing not to be vaccinated. If ~85% is needed for herd immunity then we could be rapidly approachi…

With an R0 of about 6 for the Delta variant, herd immunity won't provide a meaningful level of protection for most people. Herd immunity works with less contagious diseases because susceptible individuals can go their whole lives without exposure. But with SARS-CoV-2 now being endemic worldwide we'll all eventually get exposed, it's just a question of when. So the smart move is for everyone to protect themselves by g…

They can prevent hospitals from being overwhelmed. Opening or not opening schools are one case where local communities are going to adjust based on the rates of hospitalization.

Re: The mutation that helps Delta spread

#123
post #97

Earlier quoted context omitted.

There's math you can do to roughly judge impact of partial vaccination. If R0 is six, and you're looking at hospitalization, estimate vaccine efficacy for Delta at around 90% (I've seen estimates above and below that). Taking your estimate of a 60% vaccination rate: 6 * (1 - (.6 * .9)) = 2.76 2.76 is the effective Rt, which is far above 1, so no, that is not enough to open up more without eventually overwhelming hosp…

2.76 assumes normal conditions, social distancing literally changes the equation. Mask use for example pushes that down. It’s easier to get below 1 with a 50% vaccination rate than a 0% rate. Meaning we can open up more without overwhelming hospitals.

That's pretty much what I said in my last line. The problem is, "opening up more" generally tends to mean things like less masking and less social distancing. So to the extent that Rt is pushed down by mitigation measures, Rt gets pushed back up when those mitigation measures end.

Re: The mutation that helps Delta spread

#124

Since the deadliest virus mutations kill their hosts, weaker virus mutations can spread (without killing their hosts) more quickly. US deaths peaked in January 2021, before Delta became prevalent in the US, before substantial vaccination, https://www.worldometers.info/coronavirus/country/us/#graph-... US daily vaccines peaked in April 2021, https://ourworldindata.org/grapher/us-daily-covid-vaccine-do... India (origin…

Deaths are down because we vaccinated all the old people who were dying in the first waves

Deaths are climbing again in the US and are expected to be above where they were the same time last year within a couple weeks.

Re: The mutation that helps Delta spread

#125
post #76

Earlier quoted context omitted.

Take Vitamin D/C/Zinc/Niacin and build up natural immunity?

It's sad that this comment (and probably mine) downvoted despite being a reasonable long-term response to this virus. Instead of mandating this vaccine worldwide, why don't we focus on collectively building a better / stronger health that would prevent the large majority of severe cases?

It is downvoted because it's pseudo-science.

Re: The mutation that helps Delta spread

#126
post #99

I see the sentiment here expressed, that Covid is far from over. To be honest, I stopped following news since being fully vaccinated some time ago, so I am kind of ignorant here. Is the main problem, the unvaccinated, or that the Delta (and co.) variants are still, too dangerous for vaccinated people? Or is it the fear, that they will get more dangerous?

The main problem is that the U.S. federal government in particular has been pretending for a while that we can get to zero COVID, then blaming the unvaccinated when it doesn't happen. First, they said we need 50% vaccination to achieve, herd immunity. Then 60%. Then 70%. Then 80%. When things don't work out, they vilify and blame the unvaccinated. In reality, unvaccinated with natural immunity are likely more protect…

You were (legitimately) attacking my numbers elsewhere but here you are posting completely inaccurate information. Israel is nowhere close to "90%" vaccinated. Haaretz from 4 days ago reports them at 78%: https://www.haaretz.com/israel-news/israel-vaccine-data-how-...

Given the vaccine is not approved for people under 12, there's no way it could be 90%, as 28% of their population is 0-14 years old: https://en.wikipedia.org/wiki/Demographics_of_Israel#Age_str...

Re: The mutation that helps Delta spread

#127

Covid is going to be endemic like the flu and cold. It's not going to be eradicated, unfortunately, and I don't think we've come to terms with this yet. Now what's our plan exactly? Get vaccinated every 6 - 12 months indefinitely and always wear masks? What's our goal and what's our new normal?

Same as with what probably happened with HCoV-OC43, another betacoronavirus very similar to SARS-CoV-2. Evidence indicates that it caused a worldwide pandemic that killed a lot of people starting in 1889. Now it's endemic. Most of us catch it when we're young and healthy which gives us partial immunity later.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7252012/

https://sfamjournals.onlinelibrary.wiley.com/doi/10.1111/175...

Eventually almost all of us will be infected by some variant of SARS-CoV-2. Fortunately the vaccines are very effective at preventing death.

Re: The mutation that helps Delta spread

#128

Earlier quoted context omitted.

genetic sequencing is pretty cheap these days.

Is it to the price level (e.g. under $1K) where an individual patient could pay a lab to sequence their own virus sample? How about the cost of sequencing one drop of the vaccine vial they received, as a quality control sample of the distribution supply chain?

> Is it to the price level (e.g. under $1K) where an individual patient could pay a lab to sequence their own virus sample?

Sure. It'll run under $50 in bulk. Less, but not that much less, if you're only interested in sequencing the spike.

> How about the cost of sequencing one drop of the vaccine vial they received, as a quality control sample of the distribution supply chain?

This isn't a useful quality check. A negative result implicates your field assay rather than manufacturing.

Re: The mutation that helps Delta spread

#129

Earlier quoted context omitted.

It's sad that this comment (and probably mine) downvoted despite being a reasonable long-term response to this virus. Instead of mandating this vaccine worldwide, why don't we focus on collectively building a better / stronger health that would prevent the large majority of severe cases?

It is downvoted because it's pseudo-science.

At least in the case of vitamin D it's hardly pseudoscience. Multiple clinical studies have found that hypovitaminosis D is a serious risk factor for COVID-19.

https://vitamin-d-covid.shotwell.ca/

Re: The mutation that helps Delta spread

#130
post #93

Covid is going to be endemic like the flu and cold. It's not going to be eradicated, unfortunately, and I don't think we've come to terms with this yet. Now what's our plan exactly? Get vaccinated every 6 - 12 months indefinitely and always wear masks? What's our goal and what's our new normal?

Why indefinitely? If that was the case we would need shots for the other cold viruses as well, which we don't. As you say, Sars-2 will turn into an endemic virus and thus we will get used to it over time, death rates will drop and it will turn into a cold. There is absolutely no historic precedent to think it will turn out differently.

The only reason we don’t “need” vaccines for other cold viruses is that they’re very rarely severe, right? I’d certainly take the shot if they existed.
Post reply on HN