Updated on: Wednesday, December 08, 2021, 09:27 AM IST

COVID-19: Omicron 'stealth' strain undetectable in PCR tests

Representative Image
 | Pixabay

Representative Image | Pixabay


Scientists have discovered a new "stealth" version of the Omicron variant, which is undetectable in PCR tests. According to ‘The Guardian,’ the stealthy new variant lacks a genetic change that PCR tests use to identify the presence of the virus.

The new version of Omicron was discovered in samples from South Africa, Australia, and Canada. Professor Francois Balloux, director of the University College London Genetics Institute, told The Guardian that 6% of the Omicron genome samples submitted to the Gisaid genome database were the new stealth version of the variant, which is known as BA.2.

"There are two lineages within Omicron, BA.1 and BA.2, that are quite differentiated genetically," he said. "The two lineages may behave differently." Scientists are worried that BA.2 could cause people to have a false sense of security while unknowingly spreading the virus to others. Researchers are studying the new strain and are trying to understand how what caused it to mutate and how it mutated so quickly.

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Published on: Wednesday, December 08, 2021, 09:27 AM IST