Bangladesh, Nov. 28 -- Worried scientists in South Africa are scrambling to combat the lightning spread across the country of the new and highly transmissible omicron COVID-19 variant as the world grapples with its emergence.

In the space of two weeks, the omicron variant has sent South Africa from a period of low transmission to rapid growth of new confirmed cases. The country's numbers are still relatively low, with 2,828 new confirmed cases recorded Friday, but omicron's speed in infecting young South Africans has alarmed health professionals.

"We're seeing a marked change in the demographic profile of patients with COVID-19," Rudo Mathivha, head of the intensive care unit at Soweto's Baragwanath Hospital, told an online press briefi...