In early November, OSHA announced a vaccine-or-test mandate for companies with at least 100 employees. The rule — which would have impacted more than 80 million U.S. workers — was originally set to go into effect on Jan. 4.

But numerous states and business groups challenged the rule in court. On Jan. 13, the Supreme Court halted the plan. In a 6-3 ruling, the court’s conservative majority concluded that OSHA had overstepped its authority.