Table 1.
Demographic Variables and Sample Availability From Influenza A Virus (IAV)-Negative and -Positive JHMI Patients Enrolled During the 2017–2018 Season
| Variable | 2017–2018 Asymptomatic, IAV-negative | 2017–2018 IAV-positive | ||||||
|---|---|---|---|---|---|---|---|---|
| Total | Vaccinated | Unvaccinated | P Value | Total | Vaccinated | Unvaccinated | P Value | |
| n | 49 | 26 | 23 | 32 | 18 | 14 | ||
| Age, y, median (range) | 32 (18–59) | 34 (18–59) | 28 (20–56) | .12 | 47 (18–65) | 53 (18–65) | 34 (18–62) | .027* |
| Sex, No. (%) | ||||||||
| Female | 25 (51) | 13 (50) | 12 (52.2) | >.999 | 17 (53.1) | 11 (61.1) | 6 (42.9) | .47 |
| Male | 24 (49) | 13 (50) | 11 (47.8) | 15 (46.9) | 7 (38.9) | 8 (57.1) | ||
| Ethnicity, No. (%) | ||||||||
| Non-Hispanic or non-Latino | 47 (95.9) | 26 (100) | 21 (91.3) | .21 | 32 (100) | 18 (100) | 14 (100) | |
| Hispanic or Latino | 2 (4.1) | 0 (0) | 2 (8.7) | 0 (0) | 0 (0) | 0 (0) | ||
| Race, No. (%) | ||||||||
| Black or African American | 31 (63.3) | 17 (65.4) | 14 (60.9) | .77 | 24 (75) | 12 (66.7) | 12 (85.7) | .12 |
| White | 18 (36.7) | 9 (34.6) | 9 (39.1) | 7 (21.9) | 6 (33.3) | 1 (7.1) | ||
| Other | 0 (0) | 0 (0) | 0 (0) | 1 (3.1) | 0 (0) | 1 (7.1) | ||
| Serum, No. (%) | ||||||||
| Baseline | 49 (100) | 23 (100) | 26 (100) | 32 (100) | 18 (100) | 14 (100) | ||
| Convalescent | 24 (75) | 15 (83) | 9 (64) |
Demographic data collected from IAV-negative and IAV-positive patients during enrollment included patient age, sex, ethnicity, race, and vaccination status during the current influenza season. The average time since symptom onset for IAV-positive patients was 4.2 ± 1.9 days. Patients were asked to return approximately 28 days after enrollment for convalescent sample collection. Significance indicated by *.