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Why is the unvaccinated number so much lower? Is the population highly vaccinated?

walterbell 5y ago
Unclear why unvax Omicron infection is 14%, when unvax Delta infection is 44%, https://news.ycombinator.com/item?id=29633440 https://news.ycombinator.com/item?id=29633440
- dontcare007 5y ago
- vermilingua 5y ago
  These numbers stack up, if the vaccine is effective against Delta but not against Omicron. The bulk of people being infected with Delta would then be unvax, while anyone is fair game for Omicron infection, backed up by the 14%unvax/77%dvax correlating with 80%+ dvax population in Denmark.
- mahkeiro 5y ago
  Because vaccine effect on Omicron transmission is very weak.
ip26 5y ago
Yes, 80% vaccinated three months ago: https://www.npr.org/2021/09/10/1036136246/covid-denmark-eu-restrictions https://www.npr.org/2021/09/10/1036136246/covid-denmark-eu-r...
orforforof 5y ago
According to Table 2 their sample had 8,199 unvaccinated and 9,269 vaccinated. It seems odd that more cases were found in the vaccinated people, can anyone suggest why? Statistical anomaly? Edit: I misread the table, I thought column 1 was number of subjects. The replies explain well why the # of cases would be larger for the (larger) vaccinated population.
- deleted 5y ago
  [deleted]
- sdenton4 5y ago
  Consider the extremal point: If 100% of people are vaccinated, then all cases are breakthrough cases, and 0% of cases will be in unvaccinated people. At some point, the raw count of breakthrough cases crosses over and exceeds the raw count of unvaccinated cases. This doesn't mean the vaccine is ineffective, of course!
  - GameOfFrowns 5y ago
    - Xylakant 5y ago
      No, that’s not what it means. It means that comparing the absolute numbers of people infected in both groups - vaccinated people and unvaccinated people - or even the percentage of the total number of infections is not valid. You need to take the ratio of people infected relative to the group size.
    - shawabawa3 5y ago
      What? If you think for 5 seconds it's extremely easy to see how effective the vaccine is Compare the % of population that is vaxxed Vs unvaxxed, compare the % of cases in vaxxed Vs unvaxxed people, see how the percentage compares
- akrito 5y ago
  It's because many more people are vaccinated. Assume 100,000 people are vaccinated and 10,000 aren't. If the infection rate in vaccinated population is 5%, and in the unvaccinated population is 50%, then out of 10,000 infected people, 5,000 will be vaccinated and 5,000 won't.
  - landemva 5y ago
    A couple years ago vaccines prevented almost all people from getting sick. Not anymore.

Unclear why unvax Omicron infection is 14%, when unvax Delta infection is 44%, https://news.ycombinator.com/item?id=29633440 https://news.ycombinator.com/item?id=29633440

dontcare007 5y ago
vermilingua 5y ago
These numbers stack up, if the vaccine is effective against Delta but not against Omicron. The bulk of people being infected with Delta would then be unvax, while anyone is fair game for Omicron infection, backed up by the 14%unvax/77%dvax correlating with 80%+ dvax population in Denmark.
mahkeiro 5y ago
Because vaccine effect on Omicron transmission is very weak.

ip26 5y ago

Yes, 80% vaccinated three months ago: https://www.npr.org/2021/09/10/1036136246/covid-denmark-eu-restrictions https://www.npr.org/2021/09/10/1036136246/covid-denmark-eu-r...

orforforof 5y ago

According to Table 2 their sample had 8,199 unvaccinated and 9,269 vaccinated. It seems odd that more cases were found in the vaccinated people, can anyone suggest why? Statistical anomaly? Edit: I misread the table, I thought column 1 was number of subjects. The replies explain well why the # of cases would be larger for the (larger) vaccinated population.

deleted 5y ago
[deleted]
sdenton4 5y ago
Consider the extremal point: If 100% of people are vaccinated, then all cases are breakthrough cases, and 0% of cases will be in unvaccinated people. At some point, the raw count of breakthrough cases crosses over and exceeds the raw count of unvaccinated cases. This doesn't mean the vaccine is ineffective, of course!
- GameOfFrowns 5y ago
  - Xylakant 5y ago
    No, that’s not what it means. It means that comparing the absolute numbers of people infected in both groups - vaccinated people and unvaccinated people - or even the percentage of the total number of infections is not valid. You need to take the ratio of people infected relative to the group size.
  - shawabawa3 5y ago
    What? If you think for 5 seconds it's extremely easy to see how effective the vaccine is Compare the % of population that is vaxxed Vs unvaxxed, compare the % of cases in vaxxed Vs unvaxxed people, see how the percentage compares
akrito 5y ago
It's because many more people are vaccinated. Assume 100,000 people are vaccinated and 10,000 aren't. If the infection rate in vaccinated population is 5%, and in the unvaccinated population is 50%, then out of 10,000 infected people, 5,000 will be vaccinated and 5,000 won't.
- landemva 5y ago
  A couple years ago vaccines prevented almost all people from getting sick. Not anymore.