JOHANNESBURG - Discovery Health have produced some groundbreaking analysis on the latest effects of the Omicron variant.
They have completed research on the effectiveness of current vaccines have against this variant including its effect on children.
The WHO said Omicron had spread to 63 countries as of December 9.
Faster transmission was noted in South Africa where Delta is less prevalent, and in Britain, where Delta is the dominant strain.
But it stressed that a lack of data meant it could not say if Omicron's rate of transmission was because it was less prone to immune responses, higher transmissibility, or a combination of both.
Early evidence suggests Omicron causes "a reduction in vaccine efficacy against infection and transmission", the WHO said in a technical brief.