On Tuesday, the World Health Organization said a subvariant of the Omicron strain has been detected in 57 countries.
The UN health agency said that subvariants of Omicron, BA.1 and BA.1.1, which were the first versions to be identified, still account for over 96% of all the Omicron sequences uploaded to the GISAID, a global database that provides open-access to genomic data of influenza viruses and the coronavirus disease.
However, WHO added that there has been a clear rise in cases involving BA.2, the new subvariant of Omicron.
COVID-19 has infected more than 382 milion people and killed over 5.7 million worldwide.
