The U.S. Supreme Court has blocked a key part of President Joe Biden's strategy to combat the pandemic.
It rejected the policy of making COVID-19 vaccinations or weekly testing mandatory at large firms.
The nine member court was divided along political lines.
The BBC's Anthony Zurcher reports.
In the end, Joe Biden's vaccine mandate stood and fell based on how the Supreme Court interpreted the federal laws the president relied on for his actions.
The justices noted that Mr. Biden could convince Congress to enact broader vaccine mandates.
But that seems unlikely given unified Republican opposition.
In a statement, Mr. Biden said he was pleased that his actions have helped reduce the number of unvaccinated Americans to under 35 million but added he will continue to encourage states and employers to issue vaccine requirements on their own.
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