The World Health Organization began naming the variants after Greek letters to avoid public confusion and stigma. Markets plunged on Friday, the hope of taming the coronavirus dimmed and a new term entered the pandemic lexicon: Omicron. Omicron variant are detected in more countries as scientists race to find answers. LONDON/AMSTERDAM, Nov 28 (Reuters) – The Omicron coronavirus variant spread around the world on Sunday, with new cases found in the Netherlands, Denmark, and Australia even as more countries imposed travel restrictions to try to seal themselves off. The World Health Organization (WHO) said it was not yet clear whether Omicron, first detected in Southern Africa, is more transmissible than other…