TABLE 2—
COVID-19 Outbreaks and Outbreak-Associated Cases in the 25 Industries With the Highest Numbers of Outbreaks: California, January 2020–August 2021
| Industry | US Census Industry Code | No. of Reported Outbreaksa | No. of Outbreak- Associated Cases | No. of Industry Establishmentsb | Outbreak Incidence (per 1000 Establishments) | Prevention Index Rankingc |
| Residential care facilities, except skilled nursing facilities | 8290 | 4 518 | 52 410 | 8 300 | 544.4 | 2 |
| Skilled nursing facilities | 8270 | 2 585 | 91 120 | 1 979 | 1 306.4 | 1 |
| Restaurants and other food services | 8680 | 1 291 | 7 821 | 78 935 | 16.4 | 32 |
| Elementary and secondary schools | 7860 | 963 | 6 137 | 16 086 | 59.9 | 9 |
| Justice, public order, and safety activities | 9470 | 696 | 39 166 | 3 357 | 207.3 | 5 |
| Community food and housing and emergency services | 8380 | 654 | 5 508 | 1 538 | 425.0 | 3 |
| Hospitals | 8190 | 581 | 8 486 | 1 422 | 408.6 | 4 |
| Grocery stores | 4970 | 501 | 3 772 | 10 782 | 46.5 | 18 |
| Construction | 0770 | 499 | 3 874 | 87 451 | 5.7 | 61 |
| Child day care services | 8470 | 474 | 2 604 | 8 789 | 53.9 | 16 |
| Warehousing and storage | 6390 | 327 | 7 828 | 2 308 | 141.7 | 7 |
| Automobile dealers | 4670 | 267 | 2 342 | 3 452 | 77.3 | 8 |
| Department stores and discount stores | 5380 | 266 | 2 834 | 978 | 272.0 | 6 |
| Outpatient care centers | 8090 | 262 | 1 583 | 5 949 | 44.0 | 20 |
| Real estate | 7070 | 222 | 1 570 | 54 104 | 4.1 | 71 |
| Colleges, universities, and professional schools, including junior colleges | 7870 | 217 | 3 858 | 4 999 | 43.4 | 25 |
| Individual and family services | 8370 | 215 | 1 691 | 531 624 | 0.4 | 124 |
| Religious organizations | 9160 | 193 | 1 611 | 3 087 | 62.5 | 15 |
| Building material and supplies dealers | 4870 | 179 | 1 813 | 4 030 | 44.4 | 21 |
| Crop production | 0170 | 169 | 2 126 | 8 568 | 19.7 | 36 |
| Traveler accommodation | 8660 | 141 | 1 322 | 6 399 | 22.0 | 33 |
| Miscellaneous general merchandise stores | 5390 | 135 | 2 482 | 2 949 | 45.8 | 24 |
| Other amusement, gambling, and recreation industries | 8590 | 135 | 929 | 9 283 | 14.5 | 43 |
| Medical equipment and supplies manufacturing | 3960 | 127 | 1 487 | 1 811 | 70.1 | 14 |
| Bus service and urban transit | 6180 | 118 | 891 | 1 503 | 78.5 | 10 |
Note. The 25 industries shown here represented 79.1% of all outbreaks and 85.0% of all outbreak-associated cases.
If a single facility reported more than 1 outbreak during the study period, each outbreak was counted separately (i.e., a single facility might be responsible for more than 1 outbreak in the data set).
Data on numbers of establishments by industry were obtained from the California Employment Development Department Quarterly Census of Employment and Wages and calculated as the average number of establishments from the first through the fourth quarter of 2020.
Prevention indexes were calculated as the average of the count rank and the incidence rank; the numbers shown here represent prevention index rankings among all individual industries. A lower numeric prevention index ranking indicates an industry with a higher priority for intervention.