Table 1.

Characteristics of the study group

	Childhood group N = 72 (%)	Adulthood group N = 166 (%)	Whole group N = 238 (%)
Female	26	109	135 (56.7 %)
Male	46	57	103 (43.3 %)
Age	10.3 ± 4.7	42.5 ± 13.7	32.7 ± 18.9
Symptom-onset interval (days)	2.8 ± 1.9	2.3 ± 1.5	2.3 ± 1.6
Seasonal Flu vaccine	2 (2.8 %)	11 (6.6 %)	13 (5.5 %)
Presence of chronica diseases	2 (2.8 %)	19 (11.4 %)	21 (8.8 %)

^aValid percent of chronic diseases; allergic rhinitis 4 %, asthma 1.6 %, diabetes and hepatitis C 4 %, diabetes and hypertension 4 %, epilepsy 4 %, hypothyroid 4 %, hypertension 1.2 %, hypertension and congestive cardiac failure 4 %, chronic pulmoner diseases 4 %, chronic obstructive pulmoner diseases 8 %, chronic obstructive pulmoner diseases and hypertension 4 %, breast cancer 4 %, splenectomy 4 %.