It’s not conspiracy about tests. I posted a link where it is being and has been discussed and I said nothing that wasn’t backed up by that article at the link. It’s just how it is.
The DNA sequencing tests certainly detect all forms of covid and is how omicron was discovered. But the other tests to varying degrees use molecular templates that match and fit specific features of the virus. Depending on how the test is designed, it may be more specific or less. The more specific a test is, the less likely it will see a strong response from this highly mutated variant. Some tests use mixtures of templates to be more general but the jury is still out on which tests see omicron and to what extent. Those tests tend to have higher thresholds for a positive test anyway. If the omicron mutation set is less of a match, detection limits will increase and some sick might still test negative - a false negative.
I included that information for those who might want to modify routines and behaviors just in case. Apparently omicron is able to spread among vaccinated easier than delta according to Boris Johnson. That fits with preliminary estimates of 5x infectiousness and sidestepping vaccinations to some extent. I haven’t seen anything on severity of the sickness it causes aside from South African hospitals filling quickly which implies there is some level of health risk but don’t know how much.
It was just a heads up and nobody needs to do anything based on it. But the stuff about evading tests to whatever extent is absolutely real and just a consequence of how the tests work. The people developing the tests know this stuff and again, according to the FDA in the US:
“Currently, COVID-19 tests are designed to check broadly for the SARS-CoV-2 virus, including the SARS-CoV-2 delta variant. It is common for all viruses to change and mutate over time, resulting in different virus strains. The FDA works closely with test developers to identify potential impacts of virus mutations on FDA authorized COVID-19 tests and help ensure there is minimal impact on test performance.”
The issue is that omicron is heavily mutated (some 50+ mutations in one package) and while that is expected to have some impact on test accuracy, they are working to determine by how much. But the FDA itself says there are likely false negatives with this new mutation collection. It’s something folks should be alert to in order to evaluate danger for themselves. This new one has a number of red flags about it.