Volume 27, Number 5—May 2021
Synopsis
Epidemiologic Findings from Case Investigations and Contact Tracing for First 200 Cases of Coronavirus Disease, Santa Clara County, California, USA
Nancy Ortiz
, Elsa Villarino, James T. Lee, Kristina L. Bajema, Jessica N. Ricaldi, Shanon Smith, Wen Lin, Margaret Cortese, Albert E. Barskey, Juliana F. Da Silva, Brandon J. Bonin, Sarah Rudman, George S. Han, Marc Fischer, Shua J. Chai, Sara H. Cody, and for the Santa Clara County COVID-19 Case Investigation Team1
, Elsa Villarino, James T. Lee, Kristina L. Bajema, Jessica N. Ricaldi, Shanon Smith, Wen Lin, Margaret Cortese, Albert E. Barskey, Juliana F. Da Silva, Brandon J. Bonin, Sarah Rudman, George S. Han, Marc Fischer, Shua J. Chai, Sara H. Cody, and for the Santa Clara County COVID-19 Case Investigation Team1
Table
Characteristics of first 200 confirmed COVID-19 case-patients, Santa Clara County, California, USA, January 31–March 20, 2020*
| Characteristic | No. (%) COVID-19 cases |
|---|---|
| Sex | |
| M | 112 (56.0) |
| F |
88 (44.0) |
| Age group, y | |
| <20 | 10 (5.0) |
| 20–39 | 43 (21.5) |
| 40–59 | 76 (38.0) |
| 60–79 | 53 (26.5) |
| >80 |
18 (9.0) |
| Race/ethnicity | |
| Asian | 70 (35.0) |
| Filipino | 20 (10.0) |
| Vietnamese | 15 (7.5) |
| Chinese or Taiwanese | 9 (4.5) |
| Indian | 8 (4.0) |
| Korean | 1 (0.5) |
| Laotian | 1 (0.5) |
| Unknown | 16 (8.0) |
| Hispanic | 52 (26.0) |
| White non-Hispanic | 52 (26.0) |
| Pacific Islander | 3 (1.5) |
| Black or African American | 4 (2.0) |
| Unknown |
19 (9.5) |
| Exposure type | |
| Probable community transmission | 104 (52.0) |
| Close contact with known case-patient | |
| Household | 49 (24.5) |
| Occupational | 17 (8.5) |
| Travel | |
| International | 19 (9.5) |
| Middle East | 5 (2.5) |
| Asia | 4 (2.0) |
| Europe | 3 (1.5) |
| Central America | 1 (0.5) |
| Multinational cruise | 6 (3.0) |
| Within the United States |
11 (5.5) |
| Occupation | |
| Perform work outside the home | 82 (41.0) |
| Healthcare worker | 15 (7.5) |
| Food service Worker | 8 (4.0) |
| Construction worker | 7 (3.5) |
| Airport worker | 6 (3.0) |
| Grocery store worker | 5 (2.5) |
| Firefighter | 5 (2.5) |
| Daycare worker | 4 (2.0) |
| Janitor | 3 (1.5) |
| Housekeeper | 3 (1.5) |
| Retail worker | 3 (1.5) |
| Other (e.g., security guard or realtor)† | 23 (11.5) |
| Retired | 34 (17.0) |
| Perform work inside the home | 25 (12.5) |
| Software technology or engineer | 9 (4.5) |
| Other (e.g., business, finance, or executive)† | 16 (8.0) |
| Unemployed | 13 (6.5) |
| Child (<18 y) | 7 (3.5) |
| Student | 5 (2.5) |
| Unknown |
34 (17.0) |
| Hospitalization status‡ and outcome | |
| Not hospitalized | 111 (55.5) |
| Hospitalized | 89 (44.5) |
| Did not require ICU stay | 45 (22.5) |
| Required ICU stay, but did not require mechanical ventilation | 18 (9.0) |
| Required ICU stay and required mechanical ventilation | 26 (13.0) |
| Died | 20 (10.0) |
*COVID-19, coronavirus disease; ICU, intensive care unit. †Occupations reported by <2 case-patients. ‡Classified by most severe status at time of case investigation. ¶As of March 20, 2020. Deaths for which COVID-19 was listed as the cause or other contributing cause on the death certificate were defined as COVID-19-associated deaths.
1Members of the Santa Clara County COVID-19 Case Investigation Team are listed at the end of this article.
Page created: March 26, 2021
Page updated: April 20, 2021
Page reviewed: April 20, 2021
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