RTPCR test is not completely accurate, risk of life in uncertainty: expert


Testing or testing has an important role in this period of epidemic and people get freedom to go to work or anywhere when the result of the investigation is negative. At the same time, people with positive results are isolated and attempts are made to protect others from infection. But it is important to know here that the commonly used lab-based method of testing, called PCR testing, is not completely accurate.

Many times someone is wrongly described as a Covid infected, while he is not infected, and in 0.8 to 4 percent of cases, such a wrong result is being seen. On the other hand, the assumption that it is falsely negative is very broad: which makes it uncertain: According to a comprehensive review, in about 1.8 to 58 percent of cases, people infected with Covid were given negative test reports as negative or non-infected. are given.

However, when you do a PCR test, you are informed of this or not, it depends on the policy of your health provider or the government. This matters, because, as researchers found, this uncertainty about tests affects people’s decision to understand their test result and take the next step accordingly, and in an epidemic, it can have serious health consequences.

A study on 1,744 people from the UK, in which samples were collected in proportion to the national population in terms of age and sex. Creating a hypothetical scenario, the people involved in the study were told that a person named John is not well, and given his symptoms, a knowledgeable doctor believes that he is 50:50 percent likely to have corona. In such a situation, John conducts a PCR test.

Half of the people involved in the study were told that John Corona is positive and half were told that John Corona is negative, followed by everyone who participated in the study, New Zealand Ministry of Health, US Centers for Disease Control (CDC) Or the information released by the UK National Health Service (NHS) for this situation. Some people were kept away from any such information.

The actual guidelines of the NHS say that the negative result meant that the corona virus was not found in the test, while the CDC and the NHS’s revised guidelines differed. For example, the CDC instructions say that if you are negative, you may not be infected with the virus at the time your sample was taken. In such a situation, the person is advised to take precaution. New Zealand’s Ministry of Health is more clear about the wrong negative and wrong positive tests and their distinction.

It says that false negative reports are rare in laboratory studies and he also gives reasons for this. On the contrary, he also believes that the number of false positive test reports, if any, will be very less. It was found in the study that people who are not aware of the guidelines of a health department and the test result may be wrong, they easily assume that the results of a test cannot be wrong.

These are the people who believe that John is 100 percent infected when he is test positive and not 100 percent infected when he is test negative. These people do not agree that John needs to isolate himself if the test result is negative – although in reality he may have a virus infection because John’s health was bad and it happened. But usually a person is advised to stay at home and rest, irrespective of his test result. The study also pointed to the fact that how uncertainty affects our beliefs and behavior is also in the time of such epidemic when the question is about life and death.


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