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Medicine

No One Who Got Moderna's Vaccine In Trial Developed Severe COVID-19 (sciencemag.org) 177

An anonymous reader quotes a report from Science Magazine: Continuing the spate of stunning news about COVID-19 vaccines, the biotech company Moderna announced the final results of the 30,000-person efficacy trial for its candidate in a press release today: Only 11 people who received two doses of the vaccine developed COVID-19 symptoms after being infected with the pandemic coronavirus, versus 185 symptomatic cases in a placebo group. That is an efficacy of 94.1%, the company says, far above what many vaccine scientists were expecting just a few weeks ago.

More impressive still, Moderna's candidate had 100% efficacy against severe disease. There were zero such COVID-19 cases among those vaccinated, but 30 in the placebo group. The company today plans to file a request for emergency use authorization (EUA) for its vaccine with the U.S. Food and Drug Administration (FDA), and is also seeking a similar green light from the European Medicines Agency. The data released today bolster an interim report from the company two weeks ago that only analyzed 95 total cases but produced similarly impressive efficacy. "I would still like to see all of the actual data, but what we've seen so far is absolutely remarkable," says Paul Offit, a vaccine researcher at the Children's Hospital of Philadelphia who is a member of an independent committee of vaccine experts that advises FDA.

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No One Who Got Moderna's Vaccine In Trial Developed Severe COVID-19

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  • by jfdavis668 ( 1414919 ) on Monday November 30, 2020 @07:35PM (#60780576)
    Better put them all in a hole in Denmark.
  • This is so overwhelmingly positive it reads like an ad.

    • by Dutch Gun ( 899105 ) on Monday November 30, 2020 @08:04PM (#60780656)

      Are we not allowed to have some good pandemic-related news in 2020?

      • by TechyImmigrant ( 175943 ) on Monday November 30, 2020 @08:47PM (#60780756) Homepage Journal

        Are we not allowed to have some good pandemic-related news in 2020?

        You must be new to 2020. Welcome.

      • Sure, but just to keep things balanced, can we give hopelessness some representation?
    • It's an advert because claiming "100% efficacy at preventing serious COVID" when you only had 10 cases of the disease in vaccinated people is very unscientific. Assuming a Poisson distribution of serious cases then, when you have zero serious cases all you can say is that you can exclude ~3.7 or more serious cases with a 95% confidence level.

      Since you only have 10 instances of infection with the vaccine this means all you can say is that you are 95% sure that your efficacy of preventing serious disease i
      • Perhaps you want to show us your undergrad statistics formulas to see how you come to that conclusion.
        I had had no "undergrad statistics" (what ever that mean).

        • Sure try this confidence limit calculator [danielsoper.com] (or just google "poisson confidence interval calculator"). Just put in the number of observed events which, since there were zero serious cases, is zero. If then gives you the upper limits on the mean number of events under the assumption that the number of events is Poisson distributed. In this case, it says that the mean number of events should be under 3.7 at 95% confidence and since there were only 10 cases of COVID in the vaccinated sample this means that you c
          • by jbengt ( 874751 )
            OK, I didn't have undergrad statistics, but even I know that math doesn't tell the story for a study of tens of thousands pf people, some of whom had the vaccine and some a placebo, with an unknown number of exposures to unknown amounts of the virus, of which 11 in the vaccinated group and 185 in the placebo group got the disease.
          • So, you do not know the formulas. But insult people with "every undergrad should know" ...
            ROFL :P

      • Yes! This! Please mod this up.

        You don't even need any fancy calcuations to get it. I know probably 10 people who got covid and none of them had to go to the hospital. Therefore, my study says 100% of covid patients do not need hospital treatment! If you can't find the flaw in that argument, I can't help you.

        The claim that it prevents 100% of serious cases makes me distrust Modernas reporting.

      • It's an advert because claiming "100% efficacy at preventing serious COVID" when you only had 10 cases of the disease in vaccinated people is very unscientific.

        I think you need to re-read the AAAS Science article:

        Moderna’s candidate had 100% efficacy against severe disease. There were zero such COVID-19 cases among those vaccinated, but 30 in the placebo group.

        So Moderna had zero cases of the disease in the vaccinated group, not 10. Your 10 cases may refer to:

        Pfizer and BioNTech have developed a similar mRNA vaccine against COVID-19 and also reported excellent results, with an efficacy of 95%, in the final analysis of their 45,000-person trial. In that s

  • and I would imagine that they also didn't recruit the most vulnerable people into their trial. Not sure this really tells us much of anything.
  • by RhettLivingston ( 544140 ) on Monday November 30, 2020 @09:01PM (#60780776) Journal

    Only 11 people who got the vaccine got coronavirus. 30 out of 185 who got it in the placebo group got severe disease, about 1 in 6. If the vaccinated group had the same rate of severe disease, there would be (1-(30/185))**11 = a 14% chance of 11 people getting coronavirus and not getting severe disease. If the vaccinated group had half as great a chance, there would be a 39% chance of 11 people getting coronavirus and not getting severe disease.

    Though this is hopeful, we will have to see many more vaccinated people get coronavirus before we can come to any conclusion about whether and to what degree the vaccine reduces the incidence of severe disease.

    • by hawk ( 1151 )

      For testing the hypothesis that there is a fixed chance of catching an severe case when catching a case, and that the vaccine doesn't affect severity, yes, your math is correct (and that is the correct hypothesis to test).

      What I find fascinating here is that it was so effective that we can't perform the severity test, as not enough people caught it at all to make the test . . . (or you could call this promising, or even spin, I suppose . . .)

      Also interesting is that the chance of eleven cases without severi

  • What about other symptoms? How about long term effects? Can the virus stick around and continue to cause damage somehow even after a person has been vaccinated?

    Yes, it's terrible that it's killing people. However, the long haul implications are really troubling too so I'm curious if these vaccines will vaccinate against the disease doing any damage at all, not just against hospitalization.

    • The placebo group had 90 infections, the vaccine group had 5.
      So the vaccine reduces infections by about 95%. That implies reducing damage from infections by at least 95%.

    • Well a vaccine is giving your immune system a crash course on the notable elements of an infectious agent. So, how well your body does at fighting the real thing is up to how well your immune system works. If you're immunocompromised, it won't do much good at all. If you're healthy with a robust immune response, you probably will become completely immune. But, its a crap shoot based on your particulars. If you went home after the shot and took a bunch of benadryl, ibuprofen and steroids you might stifl

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