SARS-CoV-2 Gamma variant infected 16 fully Pfizer vaccinated Guiana gold miners

Re:SARS-CoV-2 Gamma variant infected 16 fully Pfizer vaccina... by bigcorp-slave on Friday July 23, 2021 @12:39AM (#27927264)

If someone can check my math, this seems like a perfect opportunity to do a statistical test. Sample sizes are too small to say that there is a difference between previous infection and no previous infection.

Given the contingency table:

      No prior inf.   Prior inf.  
  Infected   3             0

  Uninfect   4             6

A Fisher Exact Test yields a p value of 0.1923. So there is not evidence that previously infected people are safe. Similarly, if we compare the attack rate in previous infections vs Pfizer, the p value is about 0.15, so there’s not evidence one is better than the other.

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Re:SARS-CoV-2 Gamma variant infected 16 fully Pfizer vaccina... by fooofw on Friday July 23, 2021 @04:19AM (#27928434)

I think the "4" should be changed to a "1" yielding p = 0.0333. 4 is the total number of unvaccinated miners without prior infection.

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Re:SARS-CoV-2 Gamma variant infected 16 fully Pfizer vaccina... by bigcorp-slave on Sunday July 25, 2021 @11:37AM (#27949931)

You are right, I misread the article and now it is too late to edit.

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Re:SARS-CoV-2 Gamma variant infected 16 fully Pfizer vaccina... by xpe on Friday July 23, 2021 @12:53AM (#27927345)

Would you please label the rows and columns your table? This will help others check your work.

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Re:SARS-CoV-2 Gamma variant infected 16 fully Pfizer vaccina... by bigcorp-slave on Friday July 23, 2021 @01:20AM (#27927493)

Done, thanks.

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