FILE - In this Oct. 5, 2021, file photo a healthcare worker fills a syringe with the Pfizer COVID-19 vaccine at Jackson Memorial Hospital in Miami. President Joe Biden’s most aggressive move yet to combat the COVID-19 pandemic is almost ready to see the light of day. The government is close to publishing the details of a new vaccination-or-testing rule covering more than 80 million Americans at companies with 100 or more workers. (AP Photo/Lynne Sladky, File)