by Nina LARSON GENEVA, Switzerland (AFP) — The new coronavirus variant Omicron is spreading at an unprecedented rate, the WHO said Tuesday, urging countries to act swiftly to rein in transmission and protect their health systems. Since the new, heavily-mutated variant was first detected in southern Africa last month, it has been reported in 77 countries, WHO chief Tedros Adhanom Ghebreyesus told reporters. But, he stressed, “the reality is that Omicron is probably in most […]