Children 6 Months Through 59 Months of Age
Clinical safety data for AFLURIA QUADRIVALENT in infants and young children have been collected in one clinical trial, Study 4, a randomized, observer-blind, comparator-controlled trial conducted in the U.S. in 2247 subjects aged 6 through 59 months. Subjects were stratified into one of two age cohorts of 6 through 35 months or 36 through 59 months (41.6% and 58.4% of the study population, respectively). The mean age of the population was 36.6 months, 51.6% were male, and racial groups consisted of 71.0% White, 21.5% Black, 1.1% Asian, 0.7% Native Hawaiian/Pacific Islander, and 0.3% American Indian/Native American; 26.4% of subjects were Hispanic/Latino. The mean ages of subjects 6 through 35 months and 36 through 59 months were 21.7 months and 47.1 months, respectively. Subjects in the safety population (N=2232) received either AFLURIA QUADRIVALENT (N=1673) or a U.S.-licensed comparator quadrivalent influenza vaccine (N=559). Study subjects were scheduled to receive either a single vaccination or two vaccinations 28 days apart based on their previous vaccination history. In this study, AFLURIA QUADRIVALENT and comparator vaccine were administered by needle and syringe (see Clinical Studies [14]).
Local (injection site) adverse reactions and systemic adverse events were solicited for 7 days post-vaccination. Cellulitis-like reactions (defined as concurrent Grade 3 pain, redness, and swelling/lump) at the injection site were monitored for 28 days post-vaccination. Subjects were instructed to report and return to clinic within 24 hours in the event of a cellulitis-like reaction. Unsolicited adverse events were collected for 28 days post-vaccination, and SAEs for 6 months following the last vaccination. All solicited local adverse reactions and systemic adverse events following any vaccination (first or second dose) are presented in Table 5.
Table 5: Proportion of Subjects Per Age Cohort with Any Solicited Local Adverse Reactions or Systemic Adverse Events within 7 Days after Administration of AFLURIA QUADRIVALENT or Comparator QIV (Study 4) a
|
|
|
|
|
|
|
| Percentage (%)
b
of Subjects in each Age Cohort Reporting an Event |
| 6 through 35 months | 36 through 59 months |
AFLURIA Quadrivalent N= 668-669
c | Comparator N= 226-227c | AFLURIA Quadrivalent N= 947-949
c | Comparator N= 317-318
c |
| Any | Gr 3 | Any | Gr 3 | Any | Gr 3 | Any | Gr 3 |
| Local Adverse Reactions
d |
| Pain
| 20.8
| 0.1
| 25.6
| 0.4
| 35.5
| 0
| 31.4
| 0.6
|
| Redness
| 20.8
| 0.6
| 17.6
| 1.8
| 22.4
| 2.3
| 20.8
| 5.3
|
| Swelling/Lump
| 6.1
| 0.4
| 6.2
| 0.9
| 10.1
| 1.7
| 12.9
| 2.5
|
| Systemic Adverse Events
e |
| Irritability
| 32.9
| 0.7
| 28.2
| 0.4
| -
| -
| -
| -
|
| Diarrhea
| 24.2
| 0.1
| 25.6
| 0.4
| 12.1
| 0.1
| 8.8
| 0.6
|
| Loss of Appetite
| 20.0
| 0.3
| 19.4
| 0.4
| -
| -
| -
| -
|
| Malaise and Fatigue
| -
| -
| -
| -
| 14.3
| 0.5
| 13.2
| 0.3
|
| Myalgia
| -
| -
| -
| -
| 9.9
| 0.1
| 9.4
| 0
|
| Nausea and/or vomiting
| 9.4
| 0.7
| 11.0
| 0
| 9.2
| 0.4
| 6.6
| 0.3
|
| Headache
| -
| -
| -
| -
| 6.2
| 0.4
| 5.0
| 0
|
| Fever f
| 7.2
| 2.5
| 11.9
| 2.6
| 4.8
| 1.2
| 6.0
| 0.9
|
In subjects 6 through 35 months of age, all solicited local adverse reactions and systemic adverse events were reported at lower frequencies after the second vaccination than after the first vaccination with AFLURIA QUADRIVALENT.
In subjects 36 through 59 months of age, all solicited local adverse reactions and systemic adverse events were reported at lower frequencies after the second vaccination than after the first vaccination with AFLURIA QUADRIVALENT.
The most commonly reported unsolicited adverse events in the 28 days following the first or second dose of AFLURIA QUADRIVALENT in subjects 6 through 35 months of age were rhinorrhea (11.2%), cough (10.4%), pyrexia (6.3%), upper respiratory tract infection (4.8%), diarrhea (3.7%), otitis media (2.4%), vomiting (2.4%), nasal congestion (2.4%), nasopharyngitis (1.9%), irritability (1.7%), ear infection (1.6%), croup infectious (1.4%), teething (1.3%), rash (1.2%), influenza like illness (1.0%) and fatigue (1.0%), and were similar to comparator.
The most commonly reported unsolicited adverse events in the 28 days following the first or second dose of AFLURIA QUADRIVALENT in subjects 36 through 59 months of age were cough (7.7%), rhinorrhea (4.9%), pyrexia (3.7%), upper respiratory tract infection (2.5%), vomiting (2.1%), nasal congestion (1.6%), nasopharyngitis (1.7%), ororpharyngeal pain (1.2%) diarrhea (1.1%) and fatigue (1.1%), and were similar to the comparator.
No deaths were reported in Study 4. In the 180 days following vaccinations, AFLURIA QUADRIVALENT and comparator vaccine recipients experienced similar rates of serious adverse events (SAEs), none of which were related to study vaccines. No vaccine-related febrile seizures occurred in Study 4. Unrelated SAEs of febrile seizures occurred in two AFLURIA QUADRIVALENT recipients (6 through 35 months age group) at 43 and 104 days post-vaccinations.