Table 1a.

Characteristics of VAERS reports following IIV4 compared with IIV3 in children aged 6 months–17 years, 2013–15.

	IIV4 reports 6 mos–17 years n (%) = 512	IIV3 reports 6 mos–17 years n (%) = 1,418
Male	255 (50)	692 (49)
Serious*	42 (8)	109 (8)
Median age (range) in years	5 (0−17)	4 (0−17)
Median onset interval (range) in days†	1 (0−145)	1 (0−139)
IIV given alone	287 (56)	618 (44)
Most common MedDRA preferred terms, IIV vaccines given alone¶	Injection site erythema 72 (25) Injection site swelling 49 (17) Fever 41 (14) Urticarial 34 (12) Injection site warmth 31 (11) Erythema 30 (11) Injection site pain 25 (9) Rash 21 (7) Vomiting 20 (7) Local swelling 17 (6)	Injection site erythema 105 (17) Injection site swelling 99 (16) Fever 72 (12) Erythema 63 (10) Urticaria 52 (8) Injection site warmth 51 (8) Rash 49 (8) Vomiting 38 (6) Pruritus 37 (6) Injection site pain 32 (5)