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My posts over the past two days have been about coronavirus testing: problems with false positives from PCR tests and why some countries have had lower infection rates than most others.

The key to understanding both lies in the high number of cycles that many countries use in their PCR (swab) tests.

This Twitter thread explains the issue in detail. You might need to click on the images to see them in full. They will open automatically in a new tab:

Much of the current panic about the uptick in coronavirus cases could be because some countries are using too high a cycle threshold:

Not only are we getting incorrect ‘case’ numbers but those who have had false positives are being prevented from going about their business. Read the anecdotes in the sixth tweet:

Our leaders need to re-examine how our PCR tests are being conducted:

Will this coronavirus chaos ever stop?

For many, the cure is worse than the disease.

End of series

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