The U.S. Supreme Court has blocked the Biden Administration's vaccination mandate (including weekly testing for those unvaccinated) for large employers. However, the justices have allowed a vaccination requirement for health care workers at facilities that receive federal money.
Click the news links below for more detailed information or to view the Supreme Court's opinion in its entirety:
https://www.cnn.com/2022/01/14/politics/vaccine-mandate-hhs-health-care-worker/index.html
https://www.wsj.com/articles/a-split-decision-on-vaccine-mandates-supreme-court-biden-administration-osha-cms-covid-11642116331
https://www.bbc.com/news/world-us-canada-59989476
https://www.supremecourt.gov/opinions/21pdf/21a240_d18e.pdf