For indoor holiday parties, CDC advises using a window fan to circulate the air

CDC's holiday party guidance: Window fans The agency's guidance on upcoming celebrations includes gathering outdoors and staying 6 feet apart. NBC News

The U.S. Centers for Disease Control and Prevention's recommendations for the upcoming holiday season include the idea of using a window fan to keep air at an indoor party as fresh as possible. ...

If celebrating indoors, bring in fresh air by opening windows and doors, if possible," its holiday celebrations guidance states. "You can use a window fan in one of the open windows to blow air out of the window. This will pull fresh air in through the other open windows."..r.

It recommends getting together only with members of a household, meeting remote family and friends virtually or, if necessary, "Have an outdoor celebration with everyone at least 6 feet apart." ...