She said this, speaking in the program “Science in Five Minutes” broadcast by WHO on social networks.

“The more this virus circulates, the more opportunities it has to change ... Omicron will not be the last option that we will discuss, and the possibility of future options of concern is very real,” TASS quoted her as saying.

The specialist added that while nothing is known about the properties of new strains of coronavirus, but "undoubtedly, they will be more contagious."

This is because new variants will need to outperform existing strains, she said.

Earlier, infectious disease doctor Nikolai Malyshev, MD, in an interview with Nation News, recalled the importance of observing preventive measures against the background of the detection of the Omicron coronavirus strain.