December 17, 2021
CDC (Centers for Disease Control & Prevention)
“Characteristics of the First Investigated U.S. COVID-19 Cases Attributed to the Omicron Variant
Details are available for 43 cases of COVID-19 attributed to the Omicron variant…
Among these cases of COVID-19 attributed to the Omicron variant, 34 (79%) occurred in persons who completed the primary series of an FDA-authorized or approved COVID-19 vaccine ≥14 days before symptom onset or receipt of a positive SARS-CoV-2 test result, including 14 who had received an additional or booster dose.”
document
breakthrough cases,COVID-19,clinical cases