False positive tests in schools: British summer press warns some students are using recipes from Tiktok and using sour juices to ‘cheat’ on quick tests Stay at home Teacher: These attempts can be quickly identified

The problem of false positive tests for Covid-19 in schools, which was also mentioned on Wednesday by the Minister of Health, Alexandro Ravella, a year ago in the international press, was reported in countries where such tests were used, locally or nationally. Among the students. However, this summer, the BBC and several British publications reported that some British students used solutions found on YouTube and Tiktok and used sour or orange juices to get false positive tests and thus stay home. However, there are solutions to identify fake tests in this way.

In July, the BBC quoted Mark Larch, Professor of Chemistry and Scientific Communication at the University of Hull, reading material from popular science publication The Conversation, citing a letter from a school in Liverpool to students’ parents who had been warned. Attempts to falsify false positive Covid-19 tests. Sour drinks, such as cola, or natural juices such as orange juice were used in those attempts. The teacher examines how forgery occurs and shows that it is easily recognizable.

In the case of the case registered in Great Britain half a year ago, it was a matter of lateral flow tests, which work differently, in the method of sputum collection, than those of saliva used in Roman schools, but use the same principle to obtain similar results and compounds.

And the BBC indicated that some students, based on the instructions circulating on Tik Tok videos since December last year, used juices like those mentioned to get false positive results and stay at home until the final confirmation that they were actually negative.

The quoted source notes that the antibodies in the tests have no way of interacting with the substances in the juices, so an explanation for why sour juices produce such results should be sought elsewhere. Instead, the analysis shows, the acidity of the juices would be causal, as they produce difficult conditions for antibodies developed to work at a near-neutral pH level. To correct the pH, the substance that is mixed with the sputum during the test is used. In the absence of it, acidity has strong effects on the structure and function of antibodies.

According to the mentioned analysis, it is possible to determine the false positive tests obtained in this way. The author writes: “I tried rinsing, using the spacer solution, the test I did on the gum, and of course the inactivated antibodies from the T-line returned to their normal function and released gold particles, indicating a true negative test result. “.


We remind you that the Minister of Health, Alexandro Ravella, announced, on Wednesday, that he was surprised by the high rate of false positive tests recorded during school exams, when a reporter asked him about the fact that in the confirmation tests, “out of 38 PCR tests, only 16 were confirmed.” “

The minister said: “I understand false negative tests, but I do not understand the reality of false positive tests. I think there are still problems in the habit of working with these tests and even their interpretation.” The status of false positive tests is confusing even for experts – see an opinion published by Libertatea on Thursday.

Students with a positive test result must wait for confirmation after retesting with recognized tests. The Minister of Education, Soren Combino, announced, a few days ago, in Antena 3, that positive tests registered on the basis of the rapid procedures applied in the case of students “must be confirmed or refuted with a PCR test or a rapid antigen test”. He said, “100% of parents will not take positive students to school. According to the joint order, he goes into isolation for 14 days if he submits a positive PCR result and confirms a positive saliva test result. They will wait until they send the kids back to school.”

According to Joint Order 5338/2021 of the Ministers of Education and Health, in a standardized form:

Article 6 ^ 1

1) In the event that the rapid non-invasive antigen test that is made from a saliva sample is followed, according to the instructions of the Ministry of Health No. CASE/4.216/19.11.2021, result positive, the provisions of the protocol for case management with a positive result apply to a rapid non-invasive antigen test performed from a saliva sample, set forth in point VI of the appendix to this application.

(2) A preschool child/student who has a positive result on a rapid non-invasive antigen test performed from a saliva sample, rate. (1), continues teaching activity online and can resume courses in physical presence after submitting the approved negative result of a rapid antigen test or RT-PCR, performed in the last 24 hours.

(3) A pre-school student/student who has not submitted the approved negative result of a rapid antigen test or RT-PCR, performed within the last 24 hours, resumes courses with physical attendance 14 days after the date of the positive result obtained in the test Noninvasive rapid antigen saliva test”.

Photo © Sven Weir | Dreamstime.com/ Dreamstime.com supports education in Romania and, in the context of the Covid-19 pandemic, offers free stock photos with which Edupedu.ro can illustrate as relevant its articles as possible.

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