Experts from Imperial College London have discovered a feature of one of the branches of the “Delta” strain
We are talking about subvariant AY.4.2, manifesting differently than the main strain. During the study, 100,112 PCR tests for coronavirus were tested, taken from October 19 to November 5 of this year. The “delta” strain, both the template and its branches, was detected in 841 tests, 12% of which were subvariant AY.4.2.
But it was remarkable for scientists that only 33% of those infected with AY.4.2 had the standard symptoms of covid - persistent cough, loss or change of smell, taste, fever, etc.
According to researchers, this is an important discovery,which will allow you to better understand the nature of the virus. But it is also dangerous - when there are no obvious symptoms, a person may not suspect that they are sick and be a carrier of the virus.
Source: Izvestia