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Medicine Science

Booster Shots Create a 23X Increase in Protective Antibody Levels, Study Suggests (yahoo.com) 375

The Los Angeles Times summarizes the results of a new medical study conducted by Northwestern University researchers on antibody levels protecting against Covid-19 in 974 people. "Those who were immunized against COVID-19 with two doses of an mRNA vaccine and received a booster shot about eight months later saw their levels of neutralizing antibodies skyrocket.

"Among this group of 33 fully vaccinated and boosted people, the median level of these antibodies was 23 times higher one week after the booster shot than it had been just before the tune-up dose." What's more, their median post-booster antibody level was three times higher than was typical for another group of people whose antibodies were measured a few weeks after getting their second dose of vaccine, when they're close to their peak.

And it was 53 times higher than that of a group of 76 unvaccinated people who had recovered from COVID-19 just two to six weeks earlier. Even compared to a group of 73 people who had weathered a bout with COVID-19 and went on to get two doses of an mRNA vaccine, the boosted group's median antibody level was 68% higher.

Study leader Alexis Demonbreun, a cell biologist at Northwestern University's Feinberg School of Medicine, said the data demonstrate that no matter how well protected a vaccinated person may think she is, getting a booster shot is likely to increase her neutralizing antibodies — and with it, her immunity — considerably. And because scientists expect large antibody responses to create more durable immunity, the protection afforded by the booster should last longer than the initial two-shot regimen did...

Among their other findings: After receiving two doses of vaccine, people who'd already had an asymptomatic infection were typically no better protected than vaccinated people who had never been infected.

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Booster Shots Create a 23X Increase in Protective Antibody Levels, Study Suggests

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  • Thats nice (Score:3, Interesting)

    by varlogmessages ( 7616630 ) on Saturday November 27, 2021 @06:17PM (#62026503)
    I'm more interested in what it's retention level is after 4 months. Shots 1 through 3 don't seem to hold up all that well.
    • Re:Thats nice (Score:5, Insightful)

      by khchung ( 462899 ) on Saturday November 27, 2021 @07:29PM (#62026641) Journal

      I'm more interested in what it's retention level is after 4 months. Shots 1 through 3 don't seem to hold up all that well.

      Worst case, take the 4th shot 6 months after your 3rd shot, then the 5th shot 6 months later, etc. Everybody taking 2 shots a year is a small price to pay for defeating Covid.

      • Worser case scenario (Score:4, Interesting)

        by Roger W Moore ( 538166 ) on Saturday November 27, 2021 @09:28PM (#62026865) Journal

        Worst case, take the 4th shot 6 months after your 3rd shot, then the 5th shot 6 months later, etc.

        No, the worst case is that the booster provides minimal to no additional protection for younger people and that, by using up vaccine doses with unneeded boosters we leave enough people elsewhere with no protection that, not only do some of them die but the risk of a variant that evades the vaccine protection is increased.

        I would happily take two shots a year to defeat this bloody virus but until we have data that shows that a booster is needed to avoid a serious risk of hospitalization I cannot help but think that the best way to defeat it is to give populations elsewhere their first doses....and frankly vaccine-hesitant populations nearer to home as well.

      • No the worst case is we flood the population with a shot that doesn't reduce viral load [archive.ph], doesn't reduce infection or transmission rates [nih.gov], and pressures the virus to mutate into more deadly forms while large numbers of young healthy people getting debilitating life-long injuries and disability, if not dying outright, to that same failed product.

        Which is why countries like Ireland where over 90% of the population has been given the shot are still seeing record breaking waves of cases. The only thing a "booster

        • by Rei ( 128717 )

          No the worst case is we flood the population with a shot that doesn't reduce viral load

          Vaccination reduces transmission in three manners:

          * Reduces the odds of getting infected. In case this is news to you: people who don't get infected don't transmit
          * Reduces the average length of the disease, and correspondingly, the infectious period.
          * "Viral load" (usually people just mean cycle count, which isn't the same thing) is NOT the same thing as levels of infectious virus (as opposed to j

    • Re:Thats nice (Score:5, Informative)

      by fahrbot-bot ( 874524 ) on Saturday November 27, 2021 @07:41PM (#62026667)

      I'm more interested in what it's retention level is after 4 months. Shots 1 through 3 don't seem to hold up all that well.

      According to Ask a Caltech Expert: Alex Cohen on Vaccine Boosters [caltech.edu] boosters are less about antibodies and more about strengthening/refreshing the B/T cells memory so they can respond faster. Scientists focus on antibodies because they’re the most visible and readily measured marker of immunity, though they may not be the best predictor of protection [the latter noted in the article, but not quoted below].

      What happens when you get a booster shot? Is the body's response different from the initial vaccine?

      A booster shot is a way of strengthening the body's immune memory, a reminder of what a virus looks like. It's like when you're trying to study for an upcoming exam, it helps your memory to revisit the subject matter multiple times.

      When your immune cells are activated by the first vaccine, they also make a copy of themselves that will survive in your bloodstream or in different tissues for some time. These are your memory B and T cells. In the case of a booster, instead of teaching your cells from scratch how to make antibodies and recognize the virus and so on—a process which takes between seven to 14 days—a booster activates memory cells rapidly, and they will jump into action and go back to making antibodies or killer T cells.

      The idea is that if you are infected with SARS-CoV-2, you want your immune system to react as quickly as possible; you want the virus to have as little time as possible to replicate in your body. The boosters keep your immune system's memory sharp so that it can react quickly.

      The article also discusses:

      - What happens in the body when you get your initial vaccine?

      - Some vaccines give lifelong protection—for example, the polio vaccine—while others require boosters, such as tetanus, which requires a new one every 10 years. Why does the immune system have a good memory for certain pathogens and not others?

      • Re: (Score:3, Insightful)

        Some vaccines give lifelong protection—for example, the polio vaccine—while others require boosters, such as tetanus, which requires a new one every 10 years. Why does the immune system have a good memory for certain pathogens and not others?

        It is just like killing the enemy with a gun. If you shoot it in the spike protein (hand) it is not very effective. If, however, you shoot the enemy in the core-antigen (heart) it will die.

        Vaccines that produce "lasting immunity" generally target core-proteins. Others merely target dangly bits and so have very limited effect.

        Like an addle gunman, it will take a while for the pharmaceutical companies to figure out what is the core target (if there is one). Influenza vaccines only target the dangly bits w

        • by dryeo ( 100693 )

          Good point, seems that some viruses have a stable heart that is easy to shoot such as smallpox and others have a frequently mutating heart such as the flu. Hard to shoot for the heart if it moves around.
          Thinking about it, I think the smallpox vaccine is the only single shot vaccine I've had with most requiring a booster. Same with my son and his shots. Looking into the shingles vaccine, 2 shots every 5 years for the chicken pox virus's return, cost C$170 a shot.

        • by Cyberax ( 705495 )

          It is just like killing the enemy with a gun. If you shoot it in the spike protein (hand) it is not very effective.

          Spike proteins are the most accessible for antibodies. And we're also lucky because the RBD part of the Spike protein is heavily constrained by the need to match the ACE2 receptor.

          • by Rei ( 128717 )

            This. The spike protein wasn't chosen on a whim. There's only four virion proteins total - S, N, E and M. E and M are tiny, recessed, and poorly immunogenic. N is abundant and immunogenic (though internal), but enthusiasm for it as a target was lost when it was shown to be associated with ADE. That only leaves you with S - the abundant protein that waves around across the entire viral surface and has to leave several regions exposed in order to function.

        • Re:Thats nice (Score:5, Informative)

          by jeff4747 ( 256583 ) on Sunday November 28, 2021 @01:13AM (#62027109)

          This is an utterly terrible simile.

          The spike protein isn't some unimportant dangly bit. It's the thing that lets the virus get into human cells. It is literally the most important protein in the virus, as well as the only protein in the virus that can't mutate much - it has to match our receptors for it to work and we're not mutating much.

          The reason polio requires one shot and other diseases require boosters is: We don't know. If we did, everything would require one shot.

        • It is just like killing the enemy with a gun. If you shoot it in the spike protein (hand) it is not very effective. If, however, you shoot the enemy in the core-antigen (heart) it will die.

          Vaccines that produce "lasting immunity" generally target core-proteins. Others merely target dangly bits and so have very limited effect.

          There is little point targeting the core bits if they spend all their time hidden behind the dangly bits.
          If the core(heart) is only exposed inside infected cells after the infection has already happened, there isn't as much point.
          Dangly bits on the outside like the spike, can be targeted before the virus gets a change to infect a cell. And so stop an infection spreading, or even starting.

      • >they also make a copy of themselves that will survive in your bloodstream or in different tissues for some time

        Including bone marrow, where the long term memory resides. Ellebedy's team has found long-lived immune cells in the bone marrow of recovered people (published) and vaccinated people (pending).

        We do not know how long "long term" is or how effective it will be.

    • by Strider- ( 39683 )

      Probably higher. As a rule, longer intervals between vaccinations leads to better immune results (to a point of course). It's basically the difference between your immune system saying "Hey, you're still here, I'll keep fighting you" and "Hey, I saw you a while ago and you've now come back. I'm going to add you to my long term "most wanted" list."

      In the US, and many other countries, authorities stuck with the 3 week minimum interval as specified by Pfizer and Moderna. The three weeks is pretty much the mini

    • Hmmm. I wonder what the available alternative is that you're advocating for here. Death?
    • by MrL0G1C ( 867445 )

      The people seriously ill and dying in hospitals are mostly unvaccinated so if not getting seriously ill and dying is your goal then get vaccinated. Also, take vitamin D supplements (20 mins after eating fatty food) if you haven't gotten a body tan in the last couple of months.

  • by NFN_NLN ( 633283 ) on Saturday November 27, 2021 @06:17PM (#62026505)

    How do those numbers compare to control and edge cases? For example Yoda has a midichlorian count of 17,700.

    http://www.westondeboer.com/mi... [westondeboer.com]

  • by Fly Swatter ( 30498 ) on Saturday November 27, 2021 @06:22PM (#62026515) Homepage
    As long as the body remembers how to produce more, what difference really is the level of antibodies when you are not fighting the virus? I do not find it surprising that the levels go way up when your body is 'fighting' the booster shot.
    • by hey! ( 33014 ) on Saturday November 27, 2021 @06:55PM (#62026585) Homepage Journal

      Well, yes, and your antibodies hang around for a while after they're done clearing your infection, which is a good thing because people around you are probably still spraying you with the infectious agent. But if those antibodies are needed again after their levels drop, it may take the immune system quite some time to figure out it needs to make more of them.

      That's kind of the rub with SARS-COV-2; it's secret pandemic sauce is that it evades the "innate" immune system until there's quite a bit of infection. That's how asymptomatic people can incubate the virus to the point where they're highly contagious. For the same reason, the innate immune system won't necessarily wake up your adaptive immune system in time to produce the antibodies you need to ward off COVID infection. Once it does, your immunological memory is going to help, but the virus may have incubated to high levels before memory *can* help.

      So I guess the tl;dr on this is that if this result holds up, it sure looks like a booster will help you ward off infection and transmission in the short term. It probably tells us nothing about what a booster does for us in the mid- to long-term.

      • That's how asymptomatic people can incubate the virus to the point where they're highly contagious

        This has been overstated. It can happen, but it's not super common.

      • But if those antibodies are needed again after their levels drop, it may take the immune system quite some time to figure out it needs to make more of them.

        That's what B/T cells are for to remember how to make the desired antibodies quickly and not from scratch. The booster shot helps reinforce this memory effect. See my post [slashdot.org] above with a link to and quote from a related article from Caltech.

        • by hey! ( 33014 )

          Right. What we really hope is that the booster provides us a boost to immunological memory, but that's not what *this* result shows.

          I think it's reasonable to be optimistic about boosting immunological memory, but we'll have to wait and see how much, if any the booster. The Phase 3 trial for boosters followed up with recipients 80 days after getting their booster, and really only demonstrates short term effectiveness.

    • Think of it like the military. We could have all the knowledge of how to produce soldiers, guns and military vehicles, but if we only start to do that at the time of an attack we will take considerable more damage and casualties. This is the same, having those antibodies ready and armed effectively means you can fight it faster and will be less effected.
    • Having a high antibody titer means you are prepped to start inactivating viruses immediately. You're right that you have the resident B cells to start producing them again, but that can be 3-5 days to ramp up.

      You also have continued T cell response. But studies have shown that the boosters don't really enhance either of those - they just cause more antibodies to be generated. (Which then decay at the same rate they did before.)

      The reason to get a booster is either (a) you are immunocompromised and need t

    • by Cyberax ( 705495 )

      As long as the body remembers how to produce more, what difference really is the level of antibodies when you are not fighting the virus?

      It takes time to clone the antibody-producing cells, and this gives the virus time to replicate and do damage (and to infect others).

  • by 140Mandak262Jamuna ( 970587 ) on Saturday November 27, 2021 @06:25PM (#62026523) Journal
    First shot, produced no noticeable reaction.

    Second shot four weeks later, produced a mild fever

    The booster I got recently, full blown fever, sore arms,..

    Was telling everyone I could feel the vaccine working!

    Been tested multiple times, to travel to India, when its Delta was receding but still prevalent. All clear.

    Two relatives households in India, the vaccinated members remained negative while the unvaccinated (younger not eligible for vaccines) people contracted vaccine.

    Its all anecdotal, true. But personally witnessed.

    Covid might become a permanent affliction with more to follow. Humanity might look back at the period between 1940 and 2020 as the period in history when antibiotics and vaccines gave us unwarranted sense of entitlement that we have medicines to ward off all microbes. Humans had never been in full control. The small pox virus killed the emperor of Japan. And polio attacked the President of the USA. No one was safe from them. We can beat them collectively. But at individual level it is a roll of dice.

    I recall some member of the Royal Society talking blithly about "Science has solved all the issues of nature. We can predict everything. There is nothing more to be invented." in 1905 when Einstein was just getting ready to unleash the Theory of Relativity !

    • Two relatives households in India, the vaccinated members remained negative while the unvaccinated (younger not eligible for vaccines) people contracted vaccine.

      Oh no! I didn't realize the vaccine was contagious!

    • AIDS was a big wakeup call to peoples' sense of invulnerability to infectious disease, coming about halfway between 1940 and 2020.
      • Early on AIDS was spun as disease of the homosexuals and allowed most people to think they are not vulnerable. Compared to the earlier diseases like cholera, small pox, polio, typhoid, ... where anyone can get it, rich or poor, powerful or not, AIDS was not contagious enough, random enough to shake people's over confidence.
        • AIDS is not a disease. The long name is Acquired Immune Deficiency SYNDROME. It is not a disease. It is a *SYNDROME* caused by a defective response to he HIV 1 and 2 virii.

          COVID-19 is not a disease. It is a SYNDROME (called ARDS) caused by a defective response to SARS-CoV-1 and SARS-CoV-2. ARDS is also seen with defective immune responses to RSV (Respiratoryt Synctial Virus) and Influenza A & B.

          Probably when the first common cold virii appeared (Rhinoviruses and the other 3 Corona viruses) about 3

    • to deal with the new variant if it turns out to be resistant, where there's a good chance it won't because of how the mRNA vaccines work.

      We do need to do something about antibiotics, but even that's mostly up to over use and over prescription. Universal healthcare would help a *lot* with the human side (we're already backing off the animal side, seen those adds about "no antibiotics"? That's because the gov't told them to lay off or be forced to lay off).

      But we really need universal healthcare. One
      • We need to find arguments that will persuade rich people and powerful people that it is in their self interest to fund universal healthcare.

        Having large number of people without health care is like living in an expensive home in a neighborhood with lots of combustible houses. If you dont help your neighbor fireproof his/her home, chances of your home burning down goes up. Same with healthcare. Same with crime.

        Mere existence of government protects property, and it is in the best interest of property owne

    • And polio attacked the President of the USA.

      No it didn't. It attacked a man who would later be elected to that office.
  • by burtosis ( 1124179 ) on Saturday November 27, 2021 @06:26PM (#62026525)
    With new variants continually emerging, and the mRNA vaccine payload change only taking days, with testing done in a handful of months, it’s likely we will be seeing variants start to bypass the efficacy of the original strain vaccine and thus require something like annual boosters to cover whatever is prevalent. It’s most important to keep expanding and diversifying the production volume, and streamline the safety and efficacy testing process so that we can stay on top of changes in covid and/or any future outbreaks rapidly.
    • So, like how we already treat the flu. This will just become part of that flu shot once all the hoopla dies down.
      • Moderna announced months ago that a combo mRNA flu + SAR-CoV-2 vaccine was in the works. Some employers will require it. Those that own stock will make money. Maybe, some vaccinated will be better off.

        So long as there are wet markets or other places where animals are kept in unsanitary conditions just a few hours flight from anywhere in the world, there will be new viruses to infect us globally, new pandemics. So long as there are countries with that same easy air travel and +20% of the population with

    • vaccine CI/CD
    • With new variants continually emerging, and the mRNA vaccine payload change only taking days, with testing done in a handful of months, it’s likely we will be seeing variants start to bypass the efficacy of the original strain vaccine

      I know it's conceivable that we'll get variants that avoid the original vaccine, but I think there's way too much faith that the virus will manage to do that.

      Sure, the selection pressure is huge, but they picked the spike protein because it's the one that can't mutate much. It's the protein that lets the virus into our cells. If the shape of the protein changes enough to avoid the antibodies, then it's very likely it won't fit our receptors anymore.

      Scientists and public health experts definitely need to w

  • by 93 Escort Wagon ( 326346 ) on Saturday November 27, 2021 @06:54PM (#62026577)

    I mean, come on. A study from Northwestern University? How can a university be northwestern when it's located in Evanston Illinois? That's like 2100 miles from the Pacific Ocean!

    No way that place can be trusted...

  • the Monday after the CDC made them generally available. For anyone worried about supply issues globally, the sooner you get your shot the sooner our gov't will release more supplies globally.
  • For 1000 people that survive a covid infection, how similar is each suvivors solution? I've read of 20+ different proteins that are part of the virus ( Ref https://cen.acs.org/biological... [acs.org]). Is it too simplistic to assume that the solutions all target the same marker? Are there any solutions that are better than others?
    • Is it too simplistic to assume that the solutions all target the same marker?

      The way your immune system works is it tries random sequences of the sticky end of antibodies until it finds one that sticks. Ever have everyone in your immediate family catch something but you didn't? Most likely, you got lucky and stumbled across the right sequence quick enough that you didn't feel sick.

      Anyway, since it's random it is unlikely that every recovered person is targeting the same antigen. They're going to target whatever stuck first (Mostly. Immune system's complicated).

      Are there any solutions that are better than others?

      Yes, the best ant

  • by WaffleMonster ( 969671 ) on Saturday November 27, 2021 @10:10PM (#62026919)

    Antibody levels have no known correlation with hospitalization and death. Until this changes I have zero interest in hearing about metrics which don't matter.

    Do I care in the slightest if I am infected or get sick because I didn't get a booster and my antibody levels are not thru the moon? Not while there remains a single country on earth with insufficient supply I don't. What did Tedros say 6x more going to boosters than supplying people who have not even had a prime dose. Scandalous is a polite term for what is effectively murder.

  • _IF_ I understand what I've read, antibody-antigen binding is a dynamic equilibrium process, which means that even if they don't stick for long, an excess of one reactant (the antibodies) can soak of most of the other (the antigens).

    If an antibody is like an old sticky note and falls off a variant antigen, having twenty to take its place keeps the virus out of circulation.

  • over-sensationalized (Score:5, Interesting)

    by markdavis ( 642305 ) on Saturday November 27, 2021 @11:27PM (#62026987)

    >"Booster Shots Create a 23X Increase in Protective Antibody Levels"

    Absolutely believable. And I support the concept. However, it should not be over-sensationalized:

    1) The vaccines were all designed for Alpha, not Delta, and not those variants coming later. So even if it is 23X more "antibodies", that doesn't mean a 23X increase in protection against what is infecting people now.

    2) Antibodies are not the only form of protection. T-cell memory typically imparts long-term protection to create new antibodies quickly, when needed. Those vaccinated a long time ago still likely have quite a bit of protection from severe illness or death, even if they have zero antibodies present. Such protection can often last for several years.

    >"And it was 53 times higher than that of a group of 76 unvaccinated people who had recovered from COVID-19 just two to six weeks earlier."

    That is a meaningless number. Those who recovered that recently were, no doubt, fighting Delta, and their resulting anti-bodies (and T-cell memory) will likely be much better at protecting against Delta than the antibodies an Alpha booster vaccine might create. And, presumably, more effective at the next variant that comes (since it will likely mutate from Delta and therefore be closer to Delta than Alpha).

    And there is little doubt that other variants will come. COVID-19 cannot be eradicated, and so that should not be the goal.

    • by Cyberax ( 705495 )

      1) The vaccines were all designed for Alpha, not Delta, and not those variants coming later. So even if it is 23X more "antibodies", that doesn't mean a 23X increase in protection against what is infecting people now.

      Delta only has one mutation in the RBD part of the spike and just several more mutations in the NTD part. So there was no real need to customize the vaccine.

    • The vaccines were all designed for Alpha, not Delta

      The vaccines were designed for the ancestral variant, not for Alpha. Alpha is so called because it was the first significant new variant after the original one.

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