Home / news / Coronavirus: Spain says rapid tests from China work 30% of the time

Coronavirus: Spain says rapid tests from China work 30% of the time

Coronavirus: Spain says rapid tests from China work 30% of the time

View Reddit by jal_20View Source

32 comments

  1. Some people here seem to have trouble grasping how a test can have 30% accuracy, saying a random decision would be better. Others say you could just take ten tests and get a much better accuracy. Both are wrong assumptions.

    Let me explain: These tests are apparently suffering from a lack of sensitivity, meaning the failures are always **false negatives**. That means the Spanish doctors took samples from patients that had already tested positive in lab tests and fed them into the Chinese-made rapid tests. Only 30% of the time the rapid test had the expected positive result. The rest of the time it would show up negative even though the doctors knew it should be positive.

    It’s however not as easy as just taking the test multiple times as the problem is not fluctuation, but lack of sensitivity. It’s therefore very likely that the test would consistently return a negative result for a given patient if the viral load in the nasopharyngeal samples taken from them is not high enough that it can be detected by the rapid test.

  2. This was news in Spain a few days ago, but there’s one important bit that headlines always [conventiently] miss:

    > The Chinese Embassy in Spain said on Twitter on Thursday that the medical supplies China was donating to other countries did not include Bioeasy products.

    > It said that the Chinese Ministry of Commerce gave Spain a list of manufacturers and that Bioeasy was not among them, adding that it had not been given a license from China’s National Medical Products Administration to sell its products.

    These tests were not recommended by China, not even approved by them. Assuming China is telling the truth (and nobody in Spain denied it atm), it was a mistake on the Spanish side.

    Anyway, these tests were not part of the “big supply purchase” Spain made to China. They were purchased before, as a gap until supplies could be acquired and distributed.

  3. The company claims that the false negatives are due to medics not following the instructions on how to take samples, stressing that rapid tests require much more diligence in nasopharyngeal sample taking than the lab tests the medics are familiar with.

    https://www.yicaiglobal.com/news/china-bioeasy-says-spain-faulty-covid-19-test-kits-were-not-used-correctly

    At the same time, local authorities in Shenzhen have apparently started an investigation into the company.

    https://www.sixthtone.com/ht_news/1005397/shenzhen-company-investigated-over-inaccurate-covid-19-tests-sold-to-spain

  4. This is Reddit, the only thing that matters is the tittle.

  5. Is this going to be posted here everyday?

    Isn’t there enough discussion about this already?

    1. They bought unlicensed test. Also they wanted POC test and expect PCR sensitivity?

    2. They didn’t follow strictly the sample collection procedure. The company has given them further instruction.

    3. They are re-evaluating the tests and result will come in a few days.

    Can’t we just wait for the further test result before sharing this article again and again? It’s from businessinsider. Since when did we seek medical information from them..?

  6. Just use 4 tests for a 120% success rate

  7. Why are people reposting this? It has already been debunked

  8. Isn’t this pretty much expected for a rapid antibody test? Do we know that the test is actually defective? Why were doctors making decisions based on a rapid antibody test? All of these articles provide pretty close to nothing.

    It’s known that antibody response to viruses can be delayed especially in people with weak immune systems. It’s not clear that 30% sensitivity compared to PCR should be unexpected. All of the other diagnostic rapid tests for covid detect nucleic acids.

  9. So China gives Spain a list of approved manufacturers, and Spain just goes ahead and buys from a company not licensed by China’s National Medical Products Administration.

  10. The test kits were sourced from a manufacturer that was not on Chinese government’s approved list of medical suppliers.

    Were the test kits donated by this company or did some official just ordered them from Alibaba?

  11. So they’re like cheap pregnacy test. You buy 10 for a nickel and take all of them at the same time, *am I right people?*

  12. Oh just read the article . Others can search I read the news yesterday someone posted the same news from different source I dug a little deeper.

  13. It seems that those tests are antibody tests, and patients don’t usually begin to have antibody in their blood after one week. So these tests are terrible at diagnosing early stage patients. PCR tests should still be the first choice.

  14. Whatever result it gives you, announce the opposite, and now they work 70% of the time, yay!

  15. Ah, that famous Chinese level of product quality.

  16. So many racist who didn’t read or do any research.

    “It said that the Chinese Ministry of Commerce gave Spain a list of manufacturers and that Bioeasy was not among them, adding that it had not been given a license from China’s National Medical Products Administration to sell its products.”

    Edit: call it what you want. The blind hate is crazy.

  17. This is misleading. Only a fraction of the tests acquired have a sensibility of 30%. The rest are ok and are also from China.

  18. Less than purely guessing.

  19. Anti-Chinese propaganda I reckon to try to justify why the US is turning away their help (and the WHO), so we can let domestic businesses price gauge better.

  20. its interesting how reddit ties soo hard to make china look badly even if world leaders on television praise them for their effort and progress. Redditors are some of the biggest hypocrites I’ve ever seen.

  21. Clickbait as the failed batch were only 5000 units that were already returned but hey click here! Btw spanish here.

  22. The real headline: moronic Spanish buy non vetted non approved and non certified tests and then are shocked when they’re not good.

  23. >works 30% of the time

    Fuck, I wouldn’t even bother – too many false negatives and false positives – the integrity of all the testing they have done is fucked. Will probs have to retest most people again using different test kits.

  24. 30% of the time, they work everytime.

  25. so flipping a coin would give more accurate results?
    or, better yet, flip it around and read positive as false and yield 70% success !

  26. 30% of the time they work *every* time, baby 😉

  27. This kind of reminds me of when I paid $800 for an allergy test that was only 50% accurate!

  28. Things in general don’t work in this country

  29. Typical, they want you to buy 3 of everything

  30. To be fair, that’s 30% more than I would’ve thought would work…

Leave a Reply