CDC is working with state and local public health officials to monitor the spread of Omicron.
As of December 20, 2021, Omicron has been detected in most states and territories and is rapidly increasing the proportion of COVID-19 cases it is causing.
Explainer: Is China's zero-COVID policy sustainable
Rumble
China is doubling down on its "zero-COVID" strategy, saying the spread of the potentially milder Omicron variant..
