4 ms·

Are you sure there are false positives with the serological tests they're using? As far as I've read, there are tests with only false negatives, and if I don't

by nchie 6y ago

Are you sure there are false positives with the serological tests they're using? As far as I've read, there are tests with only false negatives, and if I don't misremember they were the ones used for the Swedish statistical study released (and retracted) last week.

acqq 6y ago
> Swedish statistical study released (and retracted) last week I don't know any details about that specific study, or why it was retracted etc, so any links to more info appreciated! I was writing about the general problems existing when there are little actual positives, and also about the known or maybe somewhere less mentioned issues.
- SiempreViernes 6y ago
  Rumour tells me the problems were mostly related to unaccounted selection bias of the test group, not the lab methods used.
- nchie 6y ago
  I've only read about it in Swedish, but here's [1] a Reddit post discussing it in English (with the top-comment referencing a later news article which says the study was retracted). 1: https://www.reddit.com/r/COVID19/comments/g4znbg/at_least_11_of_tested_blood_donors_in_stockholm/ https://www.reddit.com/r/COVID19/comments/g4znbg/at_least_11...
  - acqq 6y ago
    Thanks. Automatically translated highlights of: https://www.svt.se/nyheter/inrikes/nya-antikroppstestet-baserat-pa-osakert-underlag https://www.svt.se/nyheter/inrikes/nya-antikroppstestet-base... "Uncertain conclusions of the new antibody test -- Updated April 22, 2020 Published April 21, 2020" "The assignment was presented in yesterday's News by Jan Albert, professor of clinical microbiology and chief physician. Now the researchers are withdrawing the report - because it may be based on uncertain evidence." "The study already used existing tests from healthy blood donors as a basis. The preliminary results showed that 11 out of 100 bar on antibodies to the coronavirus in Stockholm. Today, the group behind the research has gone out with information that this is not true - they have used unsafe evidence." "Thus, there may be fewer than 11 out of 100 infected, but how many can not say until they have done the study. In the coming weeks, they will start over from the beginning. The tests already done will be scrapped."

by nchie 6y ago

acqq 6y ago

> Swedish statistical study released (and retracted) last week I don't know any details about that specific study, or why it was retracted etc, so any links to more info appreciated! I was writing about the general problems existing when there are little actual positives, and also about the known or maybe somewhere less mentioned issues.

SiempreViernes 6y ago
Rumour tells me the problems were mostly related to unaccounted selection bias of the test group, not the lab methods used.
nchie 6y ago
I've only read about it in Swedish, but here's [1] a Reddit post discussing it in English (with the top-comment referencing a later news article which says the study was retracted). 1: https://www.reddit.com/r/COVID19/comments/g4znbg/at_least_11_of_tested_blood_donors_in_stockholm/ https://www.reddit.com/r/COVID19/comments/g4znbg/at_least_11...
- acqq 6y ago
  Thanks. Automatically translated highlights of: https://www.svt.se/nyheter/inrikes/nya-antikroppstestet-baserat-pa-osakert-underlag https://www.svt.se/nyheter/inrikes/nya-antikroppstestet-base... "Uncertain conclusions of the new antibody test -- Updated April 22, 2020 Published April 21, 2020" "The assignment was presented in yesterday's News by Jan Albert, professor of clinical microbiology and chief physician. Now the researchers are withdrawing the report - because it may be based on uncertain evidence." "The study already used existing tests from healthy blood donors as a basis. The preliminary results showed that 11 out of 100 bar on antibodies to the coronavirus in Stockholm. Today, the group behind the research has gone out with information that this is not true - they have used unsafe evidence." "Thus, there may be fewer than 11 out of 100 infected, but how many can not say until they have done the study. In the coming weeks, they will start over from the beginning. The tests already done will be scrapped."