RESUMEN
The aim was to demonstrate the immunogenicity and safety of a DTaP-IPV//PRP-T combined vaccine (Pentaxim(®)) compared to individual vaccines in infants in the People's Republic of China. Infants (N=792) were randomly assigned to receive DTaP-IPV//PRP-T at 2, 3 and 4 months of age (Group A) or 3, 4 and 5 months of age (Group B), or DTaP (Wuhan Institute of Biological Products), PRP-T (Act-Hib(®)) and IPV (Imovax(®) Polio) at 3, 4 and 5 months of age (Group C). Antibody titers were measured pre- and 1 month after the third vaccination; non-inferiority analyses were performed for seroprotection/seroconversion (SP/SC) rates. Safety was assessed 1 month after the primary series. SP/SC rates for the DTaP-IPV//PRP-T vaccine were high and non-inferior to the controls. Reactogenicity was low for each group and no hypotonic hyporesponsive episode or seizure was reported. In conclusion, the DTaP-IPV//PRP-T vaccine was highly immunogenic, non-inferior to the commercially available control vaccines and had a good safety profile for both primary administration schedules.
Asunto(s)
Vacuna contra Difteria, Tétanos y Tos Ferina/efectos adversos , Vacuna contra Difteria, Tétanos y Tos Ferina/inmunología , Vacunas contra Haemophilus/efectos adversos , Vacunas contra Haemophilus/inmunología , Vacunas contra Hepatitis B/efectos adversos , Vacunas contra Hepatitis B/inmunología , Inmunización Secundaria/métodos , Vacuna Antipolio de Virus Inactivados/efectos adversos , Vacuna Antipolio de Virus Inactivados/inmunología , Vacunación/métodos , Factores de Edad , Anticuerpos Antibacterianos/sangre , Anticuerpos Antivirales/sangre , China , Vacuna contra Difteria, Tétanos y Tos Ferina/administración & dosificación , Femenino , Vacunas contra Haemophilus/administración & dosificación , Vacunas contra Hepatitis B/administración & dosificación , Humanos , Lactante , Masculino , Vacuna Antipolio de Virus Inactivados/administración & dosificación , Vacunas Combinadas , Vacunas Conjugadas/administración & dosificación , Vacunas Conjugadas/efectos adversos , Vacunas Conjugadas/inmunologíaRESUMEN
This study assessed the antibody persistence, and the immunogenicity and safety of a booster dose of a DTaP-IPV//PRPâ¼T (Pentaxim®, Sanofi Pasteur's AcXim family) combined vaccine and of standalone vaccines one year after primary vaccination in the People's Republic of China. Participants (N=719) previously primed with DTaP-IPV//PRPâ¼T at 2, 3, 4 months (Group A, N=255), 3, 4, 5 months (Group B, N=233), or DTaP (Wuhan Institute of Biological Products), PRP-T (Act-Hib®) and IPV (Imovax® Polio) at 3, 4, 5 months (Group C, N=231) received boosters of the same vaccines at 18-20 months of age. Seroprotection (SP) and seroconversion (SC) were determined before and 1 month after the booster. Safety was monitored from parental reports. In all groups 87.6-100% of participants had pre-booster protective anti-PRP, -diphtheria, -tetanus and -poliovirus antibody titers; post-booster, all SP rates were 100% and SC was ≥ 80.4% for anti-pertussis titers ≥ 4-fold increase. Reactogenicity was low for each group. These data support the use of the DTaP-IPV//PRPâ¼T vaccine in the People's Republic of China compared to separate DTaP, IPV, and PRPâ¼T administration in terms of both safety and immunogenicity.
Asunto(s)
Vacunas contra Difteria, Tétanos y Tos Ferina Acelular/inmunología , Vacunas contra Haemophilus/inmunología , Inmunización Secundaria , Vacuna Antipolio de Virus Inactivados/inmunología , Toxoide Tetánico/inmunología , Anticuerpos Antibacterianos/sangre , Anticuerpos Antivirales/sangre , Formación de Anticuerpos , China , Vacunas contra Difteria, Tétanos y Tos Ferina Acelular/administración & dosificación , Vacunas contra Difteria, Tétanos y Tos Ferina Acelular/efectos adversos , Vacunas contra Haemophilus/administración & dosificación , Vacunas contra Haemophilus/efectos adversos , Humanos , Esquemas de Inmunización , Lactante , Vacuna Antipolio de Virus Inactivados/administración & dosificación , Vacuna Antipolio de Virus Inactivados/efectos adversos , Toxoide Tetánico/administración & dosificación , Toxoide Tetánico/efectos adversos , Vacunas Combinadas/administración & dosificación , Vacunas Combinadas/efectos adversos , Vacunas Combinadas/inmunologíaRESUMEN
OBJECTIVE: The aim of this study was to demonstrate the immunogenicity and safety of diphtheria, tetanus, pertussis (acellular, component), poliomyelitis (inactivated) vaccine (adsorbed) and Haemophilus influenzae type b conjugate vaccine (DTaP-IPV//PRP-T) combined vaccine compared with commercially available DTaP (diphtheria, tetanus and pertussis), Haemophilus influenzae type b (Hib), tetanus conjugate and IPV monovalent vaccine. METHODS: Subjects were randomly divided into three groups, Group A and Group B were DTaP-IPV//PRP-T combined vaccine (PENTAXIM(TM)) vaccinated at 2, 3, 4 months of age or 3, 4, 5 months of age respectively; Group C was commercially available DTaP. Hib tetanus conjugate (Act-HIB(TM)) and IPV (IMOVAX PolioTM(TM)) vaccines vaccinated at 3, 4, 5 months of age. All groups received booster dose at 18 to 20 months of age, with antibody titers tested. Non-inferiority analysis was demonstrated in terms of seroprotection/seroconversion rates between Group A, Group B respectively and Group C. Safety information was collected after each vaccination to assess the safety of investigational vaccines. RESULTS: The non-inferiority of DTaP-IPV//PRP-T combined vaccine vaccinated at 2, 3, 4 or 3, 4, 5 months of age versus DTaP, Hib tetanus conjugate and IPV vaccine was demonstrated for all vaccine antigens in both primary and booster phases in terms of seroprotection/seroconversion rates. DTaP-IPV//PRP-T combined vaccine was well tolerated. The rate of solicited/unsolicited severe adverse reactions was very low and similar to the control vaccines. CONCLUSION: DTaP-IPV//PRP-T combined vaccine was highly immunogenic with good safety profile in Chinese infants, which was comparable to the commercially available control vaccines.