Epidemiological data regarding tetanus and diphtheria immunity in elderly people in Brazil are scarce. During the First National Immunization Campaign for the Elderly in Brazil in April 1999, 98 individuals (median age: 84 years) received one tetanus-dyphtheria (Td) vaccine dose (Butantan Institute, lot number 9808079/G). Inclusion criteria were elderly individuals without a history of severe i...

OBJECTIVE To evaluate the immunogenicity and reactogenicity of an acellular pertussis vaccine (pa) either formulated with diphtheria and tetanus toxoids (dTpa) or administered consecutively with a licensed tetanus and diphtheria vaccine (Td) as a 5th dose in adolescents. METHODS A total of 510 healthy children 10 to 13 years of age were assigned randomly, using a single-blind design, to recei...

Since 1966, the Advisory Committee on Immunization Practices (ACIP) has recommended tetanus-diphtheria toxoid (Td) be used instead of single antigen tetanus toxoid (TT) because, while both vaccines protect against tetanus, only Td protects against diphtheria. Despite this recommendation, approximately 2.5 million doses of TT were distributed annually from 1991 to 1997. One possible explanation ...

This phase II clinical trial was conducted to compare the immunogenicity and safety of a newly developed tetanus-reduced diphtheria (Td) vaccine (GC1107-T5.0 and GC1107-T7.5) and control vaccine. This study was also performed to select the proper dose of tetanus toxoid in the new Td vaccines. Healthy adolescents aged between 11 and 12 yr participated in this study. A total of 130 subjects (44 G...

Tetanus and diphtheria (Td) antibodies were studied in HIV-1-infected women during puerperium. HIV group (n=61) was compared with Control group (n=101). Twenty-one women from HIV and 13 from Control group who had antibody levels lower than 0.1 IU/mL received a booster with Td vaccine. Antibodies were assessed by double antigen ELISA. Mean tetanus and diphtheria antibody levels from HIV group we...

Introduction Autoimmune diseases have been linked to COVID-19 vaccines. An increasing number of cases reported de novo immune thrombocytopenia (ITP) following mRNA This study aims investigate the incidence ITP vaccine in comparison other non-mRNA vaccines and COVID-19. Methods Data were collected from TriNetX global health research network, which covers over 117 million patients. Four different...

Vaccine-preventable diseases contribute significantly to the morbidity and mortality of U.S. adults. The Advisory Committee on Immunization Practices of the Centers for Disease Control and Prevention updates its recommended adult immunization schedule annually. The most recent updates include the permissive but not routine use of the quadrivalent human papillomavirus vaccine to prevent genital ...

background: conventional hepatitis b virus (hbv) vaccination fails to achieve efficient protection in about 5–10% of the world population. hence, different strategies have been adopted to ameliorate hbv antibody titers. this study aimed to evaluate the concurrent application of tetanus‑diphtheria (td) and hbv vaccination on hepatitis b surface (hbs) antibody titer in low‑responder healthy indiv...

The current study aimed to evaluate immunogenicity and safety of a newly developed diphtheria-tetanus toxoid (Td) vaccine, GC1107 (Green Cross Corporation, Yongin, Korea), in comparison with placebo and active comparator (licensed Td vaccine) in healthy Korean adults. A randomized, double-blind, placebo and active comparator-controlled study was conducted. Forty subjects were randomly administe...

BACKGROUND Published data on the safety of tetanus-diphtheria-acellular pertussis vaccine (Tdap) in persons aged ≥65 years are limited. This study aims to examine a large cohort of Tdap users ≥65 years for evidence of increased risk of adverse events following vaccination. METHODS A matched cohort study design and a self-controlled case series (SCCS) design were used. The study population was...