Table 4.

Characteristics of facial paralysis adverse events following immunization with influenza vaccine

Characteristica	Value [n (%)]
Adverse event severity (N = 168)
Life-threatening/death	5 (2)
Required emergency room visit	95 (38)
Required hospitalization	51 (20.4)
Prolongation of hospital stay	0 (0)
Resulted in disability	17 (6.8)
Time (in days) to symptom onset following vaccination, median (interquartile range) (N = 220)	3 (1–10)
Adverse event characteristic (N = 250)
Likely to be facial paralysis	207 (82.8)
Associated with weakness/paralysis of limbs	24 (9.6)
Associated with Guillain–Barre syndrome	19 (7.6)

^aN is not uniform for all the characteristics due to missing data in the adverse event database