SARS-CoV-2 Infections and Hospitalizations Among Persons Aged ≥16 Years, by Vaccination Status — Los Angeles County, California, May 1–July 25, 2021
Early Release / August 24, 2021 / 70
Jennifer B. Griffin, PhD1; Meredith Haddix, MPH1; Phoebe Danza, MPH1; Rebecca Fisher, MPH1; Tae Hee Koo, MPH1; Elizabeth Traub, MPH1; Prabhu Gounder, MD1; Claire Jarashow, PhD2; Sharon Balter, MD1 (
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Summary
What is already known about this topic?
Although COVID-19 vaccines are highly effective, some fully vaccinated persons will be infected with SARS-CoV-2.
What is added by this report?
During May 1–July 25, 2021, among 43,127 SARS-CoV-2 infections in residents of Los Angeles County, California, 10,895 (25.3%) were in fully vaccinated persons, 1,431 (3.3%) were in partially vaccinated persons, and 30,801 (71.4%) were in unvaccinated persons. On July 25,
infection and hospitalization rates among unvaccinated persons were 4.9 and 29.2 times, respectively, those in fully vaccinated persons. In July, when the Delta variant was predominant, cycle threshold values were similar for unvaccinated, partially vaccinated, and vaccinated persons.
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COVID-19 vaccine effectiveness, reinfection, and hospitalization in fully, partially, and unvaccinated people during the Delta variant in Los Angeles County, California.
www.cdc.gov