Yong said Omicron can spread more easily than other variants including Delta. He speculated that it would replace Delta soon once it spreads worldwide.
Meanwhile, another virologist, Anan Jongkaewwattana, wrote on his Facebook page that Hong Kong researchers, who conducted tests with bronchial and lung tissue samples, found that Omicron grows faster in the upper bronchus.
However, the virus grew slower in the lungs, which supported reports that Omicron will not be as severe as other variants.