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Thursday, June 25, 2026

Medics rubbish claims that Covid-19 PCR tests are 'unreliable and dangerous' - AFP Factcheck

Facebook posts shared repeatedly in Thailand warn that Polymerase Chain Reaction (PCR) nose swab tests for Covid-19 are inaccurate and harmful to human health, including claims that they can damage nerves and the brain. But experts told AFP there is no evidence that PCR tests are dangerous. International health bodies have approved the test as the gold standard for diagnosing Covid-19.

"Why would the government support the use of TR-PCT (sic) tests to diagnose people with Covid-19 when it gives false-positive results 90% of the time," reads a lengthy Thai-language Facebook post from October 15.

The post's reference to "TR-PCT" tests appears to be a mispelling of "RT-PCR", which stands for Reverse Transcription Polymerase Chain Reaction.

It is one of the most widely used laboratory methods for detecting the Covid-19 virus in many countries, including Thailand and New Zealand.

The post includes a link to a YouTube video which it claims shows the inventor of the PCR test, Dr Kary Mullis, stating it is not a reliable way to diagnose Covid-19.

It also alleges that inserting a nasal swab is "harmful to human health and wellbeing", claiming that it can damage nerves and the brain.

The post claims that the swabs used in PCR tests are sterilised with ethylene oxide, which it says is a carcinogenic substance.

It also alleges that wearing masks lowers oxygen levels while increasing carbon dioxide and cannot prevent people from catching the virus.

The user credits the information to...



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