Vaccine advisers to the US Centers for Disease Control and Prevention unanimously voted Sunday to recommend the distribution of the one-dose Johnson & Johnson's Covid-19 vaccine.

Centers for Disease Control and Prevention vaccine advisers voted Sunday to recommend the Johnson & Johnson Covid-19 vaccine for the US, and CDC Director Dr. Rochelle Walensky almost immediately signed off on the recommendation.

Dr. Anthony Fauci, the nation's top infectious disease expert, on Sunday urged Americans to take any of the three "highly efficacious" coronavirus vaccines now available to them and not delay getting one vaccine over another.

The US Food and Drug Administration authorized Johnson & Johnson's Covid-19 vaccine Saturday. It is the first single dose Covid-19 vaccine available in the US, and is one that "checks nearly all the boxes."

The practice of finding new uses for old medications -- called repurposing or repositioning drugs -- is not new.

With Johnson & Johnson's COVID-19 vaccine on the verge of being authorized for emergency use by the US Food and Drug Administration, Americans are taking another look at the vaccine and its data. And what they see might initially give them pause.

Vaccine advisers to the US Food and Drug Administration voted Friday to recommend the agency grant emergency use authorization to Johnson & Johnson's coronavirus vaccine.