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New York City firefighter emergency medical services personnel are vaccinated against COVID-19 at the FDNY Fire Academy in New York, Wednesday, Dec. 23, 2020.

Biden Vaccine Rule for Health Workers Blocked in 10 States

The court order said that federal Centers for Medicare & Medicaid had no clear authority from Congress to enact the vaccine mandate for providers.
Can you mix and match two-dose COVID-19 vaccines?

Can You Mix and Match COVID-19 Vaccines?

Can you mix and match two-dose COVID-19 vaccines? It's likely safe and effective, but researchers are still gathering data to be sure.
In this file photo dated Sunday, Feb. 7, 2021, a vial of the Oxford-AstraZeneca vaccine against COVID-19 at a hospital in Sofia, Bulgaria.

UN: ‘Concerning News’ Vaccines May Not Work Against Variants

The World Health Organization said new COVID-19 variants has raised questions about whether or not existing vaccines will work.