The U.S. Food and Drug Administration is expected to authorize a third dose of the COVID-19 vaccine for those with weakened immune systems as soon as Thursday, the New York Times reported Wednesday night.

The emergency-use authorization would apply to both the Pfizer
PFE,
-3.90%
-BioNTech
BNTX,
-13.76%
and Moderna
MRNA,
-15.64%
vaccines, and would benefit those who have had organ transplants or certain immunodeficiencies, the Times reported.