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If the vaccine is truly 95% effective in preventing infection, how did 9 fully vaccinated Yankees players all contract the virus?

verdverm 5y ago
1. It was a single player, the rest were other staff 2. Vaccines don't prevent infection, they reduce severity by training the body's immune system. Natural exposure works the same way. This it is not surprising that 8/9 Yankees which tested positive were asymptomatic
- atty 5y ago
  This is incorrect - from population studies, we now know that both the mRNA vaccines reduce infection rates and reduce severity of symptoms for those who do get infected. In fact, they both show about 90% efficacy at preventing infection at all. That number is probably trending down a bit with all the new strains, but it is still very high.
  - verdverm 5y ago
    I suppose that depends on how infection is defined. Nothing prevents the virus from entering the body and triggering a positive test result, especially when the tests are run with longer cycle times
  - _coveredInBees 5y ago
    The Yankee players all had J&J vaccines, so not the mRNA variety.
    - verdverm 5y ago
      https://www.cnn.com/2021/05/20/health/yankees-covid-19-breakthrough-infections/index.html https://www.cnn.com/2021/05/20/health/yankees-covid-19-break... The Yankees are reported to be using the J&J vaccine, which is a viral vector product.
- standardUser 5y ago
  I don't know where this misinformation came from, but it is absolutely false. COVID vaccines have been shown to prevent infection... https://www.cdc.gov/media/releases/2021/p0329-COVID-19-Vaccines.html#:~:text=LinkedIn-,CDC%20Real%2DWorld%20Study%20Confirms%20Protective,of%20mRNA%20COVID%2D19%20Vaccines&text=A%20new%20CDC%20study%20provides,responders%2C%20and%20other%20essential%20workers https://www.cdc.gov/media/releases/2021/p0329-COVID-19-Vacci....
  - PaulDavisThe1st 5y ago
    from your citation: > while this study evaluated vaccine effectiveness against infection, including infections that did not result in symptoms. and also: > The study demonstrates that these two mRNA vaccines can reduce the risk of all SARS-CoV-2 infections, not just symptomatic infections. You'll note that this implies a somewhat different definition of "infection" than the one I think you're reaching for.
    - standardUser 5y ago
      If you're trying to make a point, I'd ask you make it more clearly. The COVID-19 mRNA vaccines prevent infection, as the literature makes clear. What exactly is not clear?
      - PaulDavisThe1st 5y ago
        GP said: > Vaccines don't prevent infection, they reduce severity by training the body's immune system You said: > I don't know where this misinformation came from, but it is absolutely false. COVID vaccines have been shown to prevent infection... and cited a link which stated that > "... two mRNA vaccines can reduce the risk of all SARS-CoV-2 infections, not just symptomatic infections." So, the vaccines reduce the risk of being the virus being present, as well as the risk that the virus being present will cause symptoms (and by implications, the risk of severe symptoms). Your link uses the term "infection" to cover both: * virus present, no symptoms * virus present, symptoms present Many people (including GP) would tend to use "infection" to refer to a single condition: virus present. So in that sense, GP is correct: the vaccine does not necessarily prevent the vaccine from being present in the body, but it is effective at reducing the risk that this will cause symptoms. Of course, your link also implies that there a reduction in the risk that detectable virus will occur after exposure to the virus (which is great!). But my reading of the whole document suggested that the authors are keen to allow for the possibility that a fully vaccinated person may still have detectable viral load in their body. Ergo, it does not "prevent infection".
legobmw99 5y ago
I think most ball players got J&J, which has a decently lower prevention number. The encouraging news was that they all ended up asymptomatic, which is the next best thing
- _coveredInBees 5y ago
  Yes, All of the Yankee players who were vaccinated had J&J. Also, most were completely asymptomatic and no one had serious symptoms. All-in-all, it was a success story for vaccines.
deleted 5y ago
[deleted]
neither_color 5y ago
5% of one hundred million people is 5 million people.
BurningFrog 5y ago
Part of it is probably that these people get tested very often. The "95% protection rate" doesn't really mean people don't get infected. Vaccinated people get in contact with as much virus as others. What it means is their immune system defeats 95% of the infections before you notice you're sick. But if you get a test while your body is in the middle of crushing such a small infection, you'll test positive.

verdverm 5y ago

1. It was a single player, the rest were other staff 2. Vaccines don't prevent infection, they reduce severity by training the body's immune system. Natural exposure works the same way. This it is not surprising that 8/9 Yankees which tested positive were asymptomatic

atty 5y ago
This is incorrect - from population studies, we now know that both the mRNA vaccines reduce infection rates and reduce severity of symptoms for those who do get infected. In fact, they both show about 90% efficacy at preventing infection at all. That number is probably trending down a bit with all the new strains, but it is still very high.
- verdverm 5y ago
  I suppose that depends on how infection is defined. Nothing prevents the virus from entering the body and triggering a positive test result, especially when the tests are run with longer cycle times
- _coveredInBees 5y ago
  The Yankee players all had J&J vaccines, so not the mRNA variety.
  - verdverm 5y ago
    https://www.cnn.com/2021/05/20/health/yankees-covid-19-breakthrough-infections/index.html https://www.cnn.com/2021/05/20/health/yankees-covid-19-break... The Yankees are reported to be using the J&J vaccine, which is a viral vector product.
standardUser 5y ago
I don't know where this misinformation came from, but it is absolutely false. COVID vaccines have been shown to prevent infection... https://www.cdc.gov/media/releases/2021/p0329-COVID-19-Vaccines.html#:~:text=LinkedIn-,CDC%20Real%2DWorld%20Study%20Confirms%20Protective,of%20mRNA%20COVID%2D19%20Vaccines&text=A%20new%20CDC%20study%20provides,responders%2C%20and%20other%20essential%20workers https://www.cdc.gov/media/releases/2021/p0329-COVID-19-Vacci....
- PaulDavisThe1st 5y ago
  from your citation: > while this study evaluated vaccine effectiveness against infection, including infections that did not result in symptoms. and also: > The study demonstrates that these two mRNA vaccines can reduce the risk of all SARS-CoV-2 infections, not just symptomatic infections. You'll note that this implies a somewhat different definition of "infection" than the one I think you're reaching for.
  - standardUser 5y ago
    If you're trying to make a point, I'd ask you make it more clearly. The COVID-19 mRNA vaccines prevent infection, as the literature makes clear. What exactly is not clear?
    - PaulDavisThe1st 5y ago
      GP said: > Vaccines don't prevent infection, they reduce severity by training the body's immune system You said: > I don't know where this misinformation came from, but it is absolutely false. COVID vaccines have been shown to prevent infection... and cited a link which stated that > "... two mRNA vaccines can reduce the risk of all SARS-CoV-2 infections, not just symptomatic infections." So, the vaccines reduce the risk of being the virus being present, as well as the risk that the virus being present will cause symptoms (and by implications, the risk of severe symptoms). Your link uses the term "infection" to cover both: * virus present, no symptoms * virus present, symptoms present Many people (including GP) would tend to use "infection" to refer to a single condition: virus present. So in that sense, GP is correct: the vaccine does not necessarily prevent the vaccine from being present in the body, but it is effective at reducing the risk that this will cause symptoms. Of course, your link also implies that there a reduction in the risk that detectable virus will occur after exposure to the virus (which is great!). But my reading of the whole document suggested that the authors are keen to allow for the possibility that a fully vaccinated person may still have detectable viral load in their body. Ergo, it does not "prevent infection".

legobmw99 5y ago

I think most ball players got J&J, which has a decently lower prevention number. The encouraging news was that they all ended up asymptomatic, which is the next best thing

_coveredInBees 5y ago
Yes, All of the Yankee players who were vaccinated had J&J. Also, most were completely asymptomatic and no one had serious symptoms. All-in-all, it was a success story for vaccines.

deleted 5y ago

[deleted]

neither_color 5y ago

5% of one hundred million people is 5 million people.

BurningFrog 5y ago

Part of it is probably that these people get tested very often. The "95% protection rate" doesn't really mean people don't get infected. Vaccinated people get in contact with as much virus as others. What it means is their immune system defeats 95% of the infections before you notice you're sick. But if you get a test while your body is in the middle of crushing such a small infection, you'll test positive.