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We can still find the new variant with PCR and antigen tests, but saliva could be a better way to find the virus in the first few days than nose swabs. 

World Health Organization (WHO) classified the worldwide risk of the Omicron type of SARS-CoV-2 as “extremely high.” Based on what we know so far, Omicron may be more contagious and more resistant to the immune response triggered by either a previous infection or a vaccination. 

Scientists reported identifying a ‘stealth’ version of the variant in December when Omicron began racing across the world. This variant featured a genetic alteration that made it difficult to distinguish from other variants using quick PCR testing. 

Existing testing may not detect concerns have arisen in light of anecdotal accounts that some patients may regularly test negative for COVID-19 at home but positive on a PCR test. Positively, the World Health Organization (WHO) reports that Omicron may still be detected by PCR and fast antigen testing, along with earlier versions. 

According to research conducted in the United States, saliva is 12 times more likely than a nasal swab to yield a positive PCR result in the early stages of illness. But after three days, it appeared like there was a greater accumulation of virus in the nasal passages. 

Still a lethal virus 

The success of our reaction to the pandemic still depends on the results of our tests. WHO Director-General Dr. Tedros cautioned earlier that the virus still hospitalizes and kills millions, resulting in hospitals being completely swamped, even if the symptoms of the new Omicron variety appear milder. 

Vaccination continues to play a critical role, but not enough people throughout the world have access to it. It may protect people who have been vaccinated from more severe sickness, but they can still infect others with the virus. 

Since the test is only as good as its weakest link, it is important to target many spike genes so that even if a mutation were to affect one of them, the other would still be detected. This has been seen as a benefit in detecting an Omicron infection, as one of its unique alterations is not recorded by some RT-PCR techniques. 

Are PCR tests the only way to identify omicron? 

To begin, not all PCR tests can identify Omicron; therefore, this will depend on the specific test being utilized. Further, as WHO has stressed, “confirmation of Omicron by sequencing is suggested.” 

Referring to the original finding of the mutation in South Africa, WHO observed that numerous laboratories had indicated that “for one frequently used PCR test, one of the three target genes is not found.” 

A scientist at the IGIB in Delhi also highlighted that “unfortunately, the primer data for the bulk of kits used is not publically disclosed/available, which restricts the potential to establish which ones can detect certain variants or which ones are likely to fail for a given variation or mutations.” 


Finally, treat that attitude as genuine and keep to yourself if you’ve tested positive. The frequency of false positives was determined to be low in the most recent investigation. For a better analysis of yourself, visit US Travel for covid test Huntsville the cost-effective and premium testing service.