The novel variant — a combination of Omicron’s dominant subvariant BA.1 and another subvariant, BA.2 — caused light symptoms including low fever, muscle aches and headaches, and did not require special treatment.
WHO says global rise in Covid cases is 'tip of the iceberg'
After more than a month of decline, global Covid cases rose last week, with the biggest jump in the WHO's Western Pacific region, which includes South Korea and China.