WASHINGTON, Nov 3 (Reuters) - The U.S. Labor Department will issue its national COVID-19 vaccine and testing rule for large employers in the coming few days, White House coronavirus response coordinator Jeff Zients said on Wednesday. President Joe Biden announced in September a nationwide vaccine or testing mandate for every business with at least 100 employees, which will be implemented as a rule from the Occupational Safety and Health Administration (OSHA). read more "That will be coming quite soon. So in a matter of days at this point, and I"ll leave the details to the rule when it"s made public by the Federal Register." Zients told reporters.