Disparities in COVID-19 Cases, Deaths, and Vaccination, by Race and Ethnicity and Asian Ethnic Groups, Santa Clara County, California, 2020-2021.

Objectives: Disaggregated data on Asian ethnic groups are needed to identify health disparities among Asian people. We examined COVID-19 incidence, deaths, and vaccinations among Asian ethnic groups in Santa Clara County, California.

Methods: We extracted data on SARS-CoV-2 infections and COVID-19 vaccinations from December 15, 2020, through August 6, 2021, from the California Reportable Diseases Information Exchange and the California Immunization Registry. We assigned Asian ethnic group based on name for missing self-reported information. We calculated age-adjusted rates and rate ratios of infections and deaths and percentages of vaccinations by race and ethnicity and Asian ethnic group. We conducted multivariable logistic regression to examine factors associated with COVID-19 deaths.

Results: Although Asian residents had the lowest rate of SARS-CoV-2 infections per 100 000 people (1801.9; 95% CI, 1771.5-1832.7) among all racial and ethnic groups, when disaggregated by Asian ethnicity, Filipino (3169.0; 95% CI, 3049.1-3292.4) and Vietnamese (3008.4; 95% CI, 2916.9-3102.1) residents had the highest age-adjusted rates. Asian (38.7; 95% CI, 33.7-44.3) and non-Hispanic White (42.3; 95% CI, 37.5-47.5) residents had the lowest rate of COVID-19 deaths compared with all other racial and ethnic groups; however, Filipino (67.6; 95% CI, 49.1-90.8) and Vietnamese (63.7; 97% CI, 48.9-81.6) residents had significantly higher rates than the aforementioned groups did. Among all racial and ethnic groups, Asian residents had the highest completion rate of primary COVID-19 vaccine series by August 6, 2021 (87.0%; 95% CI, 86.8%-87.3%). Within Asian ethnic groups, Filipino residents had the lowest vaccination rate (65.0%; 95% CI, 64.4%-65.6%).

Conclusions: Differences in COVID-19 incidence, deaths, and vaccinations among Asian ethnic groups highlight the importance of data collection of ethnic groups as a standard practice.