WASHINGTON (Reuters) – The Supreme Court on Thursday blocked President Biden’s pandemic-related vaccination-or-testing mandate for large businesses at a time of escalating Covid-19 infections while allowing his administration to enforce its separate vaccine requirement for healthcare facilities.

The court acted after hearing arguments last Friday in the legal fight over temporary mandates issued in November by two federal agencies aimed at increasing U.S. vaccination rates and making workplaces and healthcare settings safer. The cases tested presidential powers to address a swelling public health crisis that already has killed more than 845,000 Americans.

The court was divided in both cases. It ruled 6-3 with the six conservative justices in the majority and three liberal justices dissenting in blocking the broader workplace ruling. The vote was 5-4 to allow the healthcare worker rule, with two conservatives, Chief Justice Roberts and Justice Kavanaugh, joining the liberals in the majority.

The federal workplace safety agency issued a rule affecting businesses with at least 100 workers requiring vaccines or weekly Covid-19 tests — a policy applying to more than 80 million employees. Challengers led by the state of Ohio and a business group asked the justices to block the Occupational Safety and Health Administration rule after a lower court lifted an injunction against it. Companies were supposed to start showing they were in compliance starting this past Monday.

The other mandate required vaccination for an estimated 10.3 million workers at about 76,000 healthcare facilities including hospitals and nursing homes that accept money from the Medicare and Medicaid government health insurance programs for elderly, disabled and low-income Americans.

The court’s unsigned ruling regarding larger businesses said that the OSHA rule was not an ordinary use of federal power.

“It is instead a significant encroachment on the lives — and health — of a vast number of employees,” the court said.

The court’s majority downplayed the risk Covid-19 specifically poses in the workplace, comparing it instead to “day-to-day” crime and pollution hazards that individuals face everywhere.

“Permitting OSHA to regulate the hazards of daily life — simply because most Americans have jobs and face those same risks while on the clock — would significantly expand OSHA’s regulatory authority without clear congressional authorization,” the court said.

In dissent, Justice Breyer wrote on behalf of the liberal justices that the decision “stymies the federal government’s ability to counter the unparalleled threat that COVID-19 poses to our nation’s workers.”

The United States leads the world in Covid-19 deaths and infections.

The high court blocked a December 17 decision by the Cincinnati-based 6th U.S. Circuit Court of Appeals that had allowed the mandate to go into effect.

The court’s order blocking enforcement while litigation continues in a lower court likely signals doom for the administration’s attempt to boost vaccination numbers by harnessing federal powers to protect workplace health and safety.

‘DO NO HARM’

In the healthcare facilities case, the court’s differently comprised majority concluded that the regulation “fits neatly” within the power Congress conferred on the government to impose conditions on Medicaid and Medicare funds, which includes policies that protect health and safety.

“After all, ensuring that providers take steps to avoid transmitting a dangerous virus to their patients is consistent with the fundamental principle of the medical profession: first, do no harm,” the court said.

The justices lifted orders by federal judges in Missouri and Louisiana blocking the policy in 24 states, allowing the administration to enforce it nearly nationwide. Enforcement was blocked in Texas by a lower court in separate litigation not at issue in the case before the Supreme Court.

Workers must be vaccinated by the end of February under the mandate.

The White House has said the two mandates will save lives and strengthen the U.S. economy by increasing the number of vaccinated Americans by the millions. U.S. Solicitor General Elizabeth Prelogar told the justices that the pandemic poses a particularly acute workplace danger, with employees getting sick and dying every day because of their exposure to the coronavirus on the job, with outbreaks across all industries.

The challengers argued that the two federal agencies overstepped their authority in issuing the mandates without specific authorization by Congress.

The Supreme Court’s consideration of the challenges to the mandates underscored how divisive the issue of vaccination has become in the United States, as in many nations. Many Republicans have been critical of vaccine mandates imposed by governments and businesses.

The pandemic has presented an ongoing test for Mr. Biden since he took office in January 2021, having promised to improve the federal response to the crisis after an approach by his predecessor Donald Trump that critics called disjointed. But like many other countries the United States is still struggling to overcome the pandemic and is facing an upswing in Covid-19 cases driven by the fast-spreading Omicron coronavirus variant.

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Image: The U.S. Supreme Court building in Washington, October 13, 2021. Reuters/Jonathan Ernst/File photo