Table 2: Characteristics of unvaccinated individuals providing convalescent serum samples.
| N = 36 | |
| Gender | |
| Female | 13 (36.1%) |
| Male | 23 (63.9%) |
| Race | |
| White | 26 (72.2%) |
| Asian | 1 (2.8%) |
| Black | 6 (16.7%) |
| Multiracial | 3 (8.3%) |
| Age | |
| Mean age ± SD (range) | 39.8 ± 20.2 (1.4 - 73.2) |
| Charlson comorbidity index | |
| 0 | 19 (52.8%) |
| 1-2 | 10 (27.8%) |
| 3-4 | 4 (11.1%) |
| >5 | 3 (8.3%) |
| Time between infection symptom onset and sample collection | |
| Mean days ± SD (range) | 30.2 ± 9.3 (14.0 - 51.0) |
| Severity of initial infection | |
| Outpatient | 20 (55.6%) |
| Hospitalized | 16 (44.4%) |
| Infecting genotype* | |
| AY.119 | 1 (2.8%) |
| AY.14 | 2 (5.6%) |
| AY.25 | 3 (8.3%) |
| AY.44 | 1 (2.8%) |
| AY.47 | 1 (2.8%) |
| AY.62 | 1 (2.8%) |
| AY.74 | 1 (2.8%) |
| B.1 | 10 (27.8%) |
| B.1.1.7 | 4 (11.1%) |
| B.1.2 | 6 (16.7%) |
| B.1.351 | 1 (2.8%) |
| B.1.617.2 | 5 (13.9%) |
*Genotypes assigned based on Pango 3.1.17 (2021-12-06). The genotype of the infecting variant was determined in all cases except for one, a traveler who had moderate-severe COVID-19 (outpatient) in the Republic of South Africa during the peak of the Beta (B.1.351) wave in January 2021.