Organizers of the 2022 Olympic Winter Games in Beijing are facing “tremendous pressure and challenges” as a result of the coronavirus pandemic, organizing committee vice president Han Zirong told reporters on Thursday. “The spread of mutant strains such as Omicron has brought great uncertainty to the global epidemic,” said Han, who admitted a “certain number of positive cases will become a high probability,” at the February 4-20 Games. China is pursuing a “dynamic zero-Covid-strategy” and Han said the Games must “resolutely implement the Chinese government’s epidemic prevention principles and …