"Omicron has been detected in all countries where we have good sequencing and it's likely to be in all countries around the world. It is quickly, in terms of its circulation, overtaking Delta. And so Omicron is becoming the dominant variant that is being detected," Kerkhove said during a virtual questions and answers session.
"This virus just may become another endemic virus in our communities and this virus may never go away. HIV has not gone away," Dr Ryan, executive director of the WHO health emergencies programme, said.
Stressing that the Covid virus may continue to transmit for a "very long time", senior WHO official Poonam Khetrapal Singh says the level of immunity in a community, through vaccination and previous infection, will determine whether it will become endemic in the long run.