"In Russia, two variants of this virus were identified. The first was discovered in April, the second - in May. Both did not spread further in the Russian Federation, since they did not have advantages over the delta strain to displace it", - Maksyutov said. ...His words are quoted by Interfax agency.
As a reminder, delta strains were discovered in India. To avoid naming variations of the virus by country of origin, the World Health Organization (WHO) has proposed naming virus strains by letters of the Greek alphabet.
A characteristic feature of the new Indian strain is that it reduces the activity of antibodies to the virus in those who have had this disease, as well as in those who have previously been vaccinated.
At the end of June, the head of Rospotrebnadzor, Anna Popova, said that the "delta plus" strain was detected in one patient who had a mild illness. The third wave of the coronavirus epidemic in Russia is associated with the spread of the Indian Delta strain.