The US Food and Drug Administration authorized an additional Covid-19 vaccine dose for certain immunocompromised people on Thursday.
 
The FDA amended the emergency use authorization for the Pfizer/BioNTech and Moderna Covid-19 vaccines to allow for an additional dose for certain people with compromised immune systems. That group includes "specifically, solid organ transplant recipients or those who are diagnosed with conditions that are considered to have an equivalent level of immunocompromise," the agency wrote in a statement.

The country has entered yet another wave of the COVID-19 pandemic, and the FDA is especially cognizant that immunocompromised people are particularly at risk for severe disease," Acting FDA Commissioner Dr. Janet Woodcock said in a statement. "After a thorough review of the available data, the FDA determined that this small, vulnerable group may benefit from a third dose of the Pfizer-BioNTech or Moderna Vaccines."

The FDA evaluated information on the use ...

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