CLEAN : First US Omicron case identified in California: Fauci

The California and San Francisco departments of Public Health, along with the CDC, have confirmed a COVID-19 case in California caused by the Omicron variant. Genomic sequencing was performed at the University of California, San Francisco, and the results were verified by the CDC to match the Omicron variant.

What was the role of the CDC in the confirmation of the COVID-19 case?

How was the sequence of the COVID-19 case confirmed?