“…Children aged 6-35 months, 3-8 years, 9-12 years, 0.13-20 years (Brydak, 2004) Children with acute lymphoblastic leukemia (ALL), vaccinated at different times after treatment (Brydak et al, 1998a(Brydak et al, ,b, 1997c Children with severe hemophilia (Brydak et al, 1998a,b) Children with bronchopulmonary dysplasia (Brydak et al, 1997b) Children with glomerulonephritis (Brydak et al, 2000) Children with chronic renal failure subjected to continuous ambulatory peritoneal dialysis, hemodialysis, and chronic renal failure vaccinated once and twice (Brydak et al, 2001b) Children infected with HIV Children vaccinated after splenectomy in age groups 0-5 years, 6-10 years, 11-15 years (Brydak et al, 2004a,b) Children with aplastic anemia, children with bronchial asthma, children with inflammatory bowel disease (Brydak, 2008) Adults Adults aged 21-30, 31-40, 41-50, 51-64, >64 years (Brydak et al, 200321-30, 31-40, 41-50, 51-64, >64 years (Brydak et al, , 2004b Billeted students of the Military Medical Academy (Brydak et al, 1997a) Patients with acute lymphoblastic leukemia (Brydak and Calbecka, 1999) Patients with chronic renal failure (Koziol-Montewka et al,…”