(ORDO NEWS) — Scientists from South Africa have learned how to improve the test for determining the Omicron strain of coronavirus.
It turned out that it was necessary to take a swab for a PCR test not from the nasopharynx, but simply from saliva.
Scientists have found that if testing is carried out on the basis of a swab from the nose, in 14% of cases Omicron cannot be detected.
The researchers came to this conclusion by examining data from 382 patients at a Cape Town hospital. Nasopharyngeal swabs and saliva samples were taken from each subject.
For the Delta strain, coronavirus was detected in saliva only in 71% of cases, and in the nasopharynx – in 100%. For Omicron, the situation was the opposite: from the nasopharynx – in 86%, from saliva – in 100%.
Scientists have suggested that this may be due to the fact that the distribution of “Omicron” with drops of saliva is more efficient. That is, the virus moved into saliva and became more contagious.
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