Table 1. Frequency of Solicited Reports of Adverse Events during the First 7 Days after Vaccine Administration, According to Study Group*.
| Event | Vaccine | Placebo† | ||||||
|---|---|---|---|---|---|---|---|---|
| First Dose (N = 50) |
Second Dose (N = 47) |
First Dose (N = 47) |
Second Dose (N = 43) |
|||||
| no. | % (95% CI) | no. | % (95% CI) | no. | % (95% CI) | no. | % (95% CI) | |
| Local symptoms | ||||||||
| Nasal discomfort | 7 | 14 (6–27) | 5 | 11 (4–23) | 2 | 4 (1–15) | 2 | 5 (1–16) |
| Nasal discharge | 15 | 30 (18–45) | 15 | 32 (19–47) | 16 | 34 (21–49) | 10 | 23 (12–39) |
| Nasal stuffiness | 15 | 30 (18–45) | 11 | 23 (12–38) | 12 | 26 (14–40) | 8 | 19 (8–33) |
| Nasal itching | 7 | 14 (6–27) | 10 | 21 (11–36) | 10 | 21 (11–36) | 5 | 12 (4–25) |
| Sneezing | 11 | 22 (12–36) | 16 | 34 (21–49) | 11 | 23 (12–38) | 9 | 21 (10–36) |
| Blood-tinged mucus | 1 | 2 (0–11) | 0 | 0 (0–8) | 1 | 2 (0–11) | 0 | 0 (0–8) |
| Nasal bleeding | 0 | 0 (0–7) | 0 | 0 (0–8) | 0 | 0 (0–8) | 0 | 0 (0–8) |
| Any local symptom | 22 | 44 (30–59) | 22 | 47 (32–62) | 23 | 49 (34–64) | 13 | 30 (17–46) |
| Systemic symptoms | ||||||||
| Fever | 0 | 0 (0–7) | 0 | 0 (0–8) | 2 | 4(1–15) | 0 | 0 (0–8) |
| Fatigue or malaise | 9 | 18 (9–31) | 1 | 2 (0–11) | 7 | 15 (6–28) | 2 | 5 (1–16) |
| Headache | 16 | 32 (20–47) | 8 | 17 (8–31) | 14 | 30 (17–45) | 9 | 21 (10–36) |
| Nausea | 7 | 14 (6–27) | 2 | 4 (1–15) | 6 | 13 (5–26) | 3 | 7 (2–19) |
| Loss of appetite | 5 | 10 (3–22) | 1 | 2 (0–11) | 5 | 11 (4–23) | 2 | 5 (1–16) |
| Abdominal cramps | 6 | 12 (5–24) | 3 | 6 (1–18) | 7 | 15 (6–28) | 4 | 9 (3–22) |
| Vomiting (≥1 episode) | 0 | 0 (0–7) | 0 | 0 (0–8) | 2 | 4(1–15) | 0 | 0 (0–8) |
| Diarrhea | ||||||||
| Any | 1 | 2 (0–11) | 0 | 0 (0–8) | 1 | 2 (0–11) | 0 | 0 (0–8) |
| ≥2 loose or liquid stools | 5 | 10 (3–22) | 6 | 13 (5–26) | 10 | 21 (11–36) | 10 | 23 (12–39) |
| Any systemic symptom | 26 | 52 (37–66) | 12 | 26 (14–40) | 24 | 51 (36–66) | 16 | 37 (23–53) |
| Any systemic or local symptom | 33 | 66 (51–79) | 29 | 62 (46–76) | 33 | 70 (55–83) | 21 | 49 (33–65) |
CI denotes confidence interval.
Data were not available during the follow-up period for one participant in the placebo group.