A range of businesses and institutions have begun scaling back vaccination requirements as the Biden administration’s mandates get tied up in court, retrenching out of fear of losing members and employees who refuse to comply.

Amtrak earlier this week backed off a mandate that would have given roughly 17,000 employees until Jan. 4 to get vaccinated or be forced to go on unpaid leave. Fewer than 500 employees have refused to get vaccinated, according to a companywide memo from CEO William J. Flynn. The loss of that many workers was expected to cause service cuts next month, an official warned lawmakers last week. The company chose to “reevaluate our policy” after the Fifth Circuit Court of Appeals issued a nationwide stay of the Biden administration’s vaccine mandate for companies with at least 100 employees. To date, about 97% of Amtrak’s workforce is either vaccinated or has obtained some kind of exemption.