A shopper wearing a face protective mask walks by Christmas decorations at The Grove shopping center.
Washington:
A top coronavirus adviser to President-elect Joe Biden delivered a stern holiday message to Americans on Thursday - "no Christmas parties" - and warned they face a COVID-19 siege for weeks to come despite the latest moves toward U.S. government approval of a vaccine.
"The next three to six weeks at minimum ... are our COVID weeks," Dr. Michael Osterholm, a member of Biden's coronavirus advisory board, told CNN. "It won't end after that, but that is the period right now where we could have a surge upon a surge upon a surge."