TABLE 1.
Number and percentage of skilled nursing facility residents and staff members with a positive confirmed SARS-CoV-2 test result, by demographic and clinical characteristics and vaccination status — Chicago, Illinois, December 2020–March 2021
| Characteristic | Vaccination status of residents and staff members with SARS-CoV-2 infections, no. (column %) |
||||
|---|---|---|---|---|---|
| Total (n = 627) | Unvaccinateda (n = 447) | Partially vaccinateda (n = 145) | Vaccinated but not immunea (n = 13) | Fully vaccinated with breakthrough infectiona (n = 22) | |
| Median age (IQR) | 60.0 (43.0–73.0) | 57.0 (39.0–71.0) | 65.0 (50.0–79.0) | 66.0 (58.0–79.0) | 61.5 (41.0–73.0) |
| Sex | |||||
| Female | 376 (60.0) | 265 (59.3) | 89 (61.4) | 7 (53.9) | 15 (68.2) |
| Male | 237 (37.8) | 168 (37.6) | 56 (38.6) | 6 (46.2) | 7 (31.8) |
| Unknown | 14 (2.2) | 14 (3.1) | 0 (–) | 0 (–) | 0 (–) |
| Race/ethnicity | |||||
| Hispanic/Latino | 58 (9.3) | 37 (8.3) | 16 (11.0) | 1 (7.7) | 4 (18.2) |
| Asian, non-Hispanic | 24 (3.8) | 11 (2.5) | 9 (6.2) | 1 (7.7) | 3 (13.6) |
| Black, non-Hispanic | 252 (40.2) | 193 (43.2) | 44 (30.3) | 7 (53.9) | 8 (36.4) |
| White, non-Hispanic | 144 (23.0) | 79 (17.7) | 55 (37.9) | 3 (23.1) | 7 (31.8) |
| Other,b non-Hispanic | 16 (2.6) | 12 (2.7) | 4 (2.8) | 0 (–) | 0 (–) |
| Unknown | 133 (21.2) | 115 (25.7) | 17 (11.7) | 1 (7.7) | 0 (–) |
| Role | |||||
| Resident | 353 (56.3) | 235 (52.6) | 97 (66.9) | 9 (69.2) | 12 (54.6) |
| Staff member | 274 (43.7) | 212 (47.4) | 48 (33.1) | 4 (30.8) | 10 (45.5) |
| Symptomsc | |||||
| Yes | 92 (14.7) | 62 (13.9) | 21 (14.5) | 1 (7.7) | 8 (36.4) |
| No | 34 (5.4) | 15 (3.4) | 5 (3.5) | 0 (–) | 14 (63.6) |
| Unknown | 501 (79.9) | 370 (82.8) | 119 (82.1) | 12 (92.3) | 0 (–) |
| Hospitalizations | |||||
| Yes | 123 (19.6) | 90 (20.1) | 27 (18.6) | 2 (15.4) | 4 (18.2)d |
| No | 504 (80.4) | 357 (79.9) | 118 (81.4) | 11 (84.6) | 18 (81.8) |
| Deaths | |||||
| Yes | 21 (3.4) | 14 (3.1) | 6 (4.1) | 0 (–) | 1 (4.6) |
| No | 606 (96.7) | 433 (96.9) | 139 (95.9) | 13 (100.0) | 21 (95.5) |
| Previous positive SARS-CoV-2 result | |||||
| Yes | 41 (6.5) | 22 (4.9) | 9 (6.2) | 4 (30.8) | 6 (27.3) |
| No | 586 (93.5) | 425 (95.1) | 136 (93.8) | 9 (69.2) | 16 (72.7) |
Abbreviations: I-NEDSS, Illinois’ National Electronic Disease Surveillance System; IQR, interquartile range.
Unvaccinated: received no COVID-19 vaccine doses; partially vaccinated: received one dose; vaccinated but not immune: received two doses but <14 days had elapsed since receipt of second dose; and fully vaccinated with breakthrough infection: received two doses and then received a positive SARS-CoV-2 test result ≥14 days after receipt of the second dose.
Persons with the following races listed in I-NEDSS as American Indian or Alaska Native, Native Hawaiian or other Pacific Islander, other, or multiracial were categorized as non-Hispanic other.
Data on symptoms were extracted from I-NEDSS for unvaccinated, partially vaccinated, and vaccinated but not immune persons. Most COVID-19 case reports are entered into I-NEDSS through electronic laboratory reporting and provide minimal information (e.g., name, date of birth, and laboratory test and results) needed to meet reporting requirements. Data on symptoms in persons with breakthrough infections were supplemented with details from case investigations, which were not completed for nonbreakthrough cases. Symptom status for many persons with nonbreakthrough infection cases is unknown.
Two residents were hospitalized for COVID-19–related reasons. Two additional residents were hospitalized for non-COVID-19–related reasons.