Health care workers will almost certainly get the first doses of COVID-19 vaccine in the U.S. when one is approved, according to Dr. José Romero, head of the committee that develops evidence-based immunization guidelines for the Centers for Disease Control and Prevention. That's a decision based on the science of what will quell the pandemic fastest. Once the Food and Drug Administration judges a COVID-19 vaccine to be safe, effective and authorized for use, the Advisory Committee on Immunization Practices will make rapid recommendations to the CDC on how a COVID-19 vaccine should be used and who should get the first shots. "We anticipate having some vaccine for the high-risk individuals — health care providers — sometime in December or early January," Romero told NPR's Mary Louise Kelly on All Things Considered. "And then more and more vaccine will be rolled out."