On November 4, 2021, the Occupational Health and Safety Administration (“OSHA”) issued an emergency temporary standard (“ETS”) requiring all large employers to adopt a mandatory COVID-19 vaccination policy for all employees or else require that all employees receive weekly COVID-19 testing and wear face coverings in the workplace. The policy, which was first announced by the Biden administration in September 2021, represents the first vaccination mandate of its kind by OSHA.