Heidi Theeten

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Achieving high vaccination coverage is a necessary, but not a sufficient indicator of the quality of a vaccination programme, in terms of control and prevention of childhood infectious diseases. For optimal protection of infants, timeliness of vaccination is increasingly recognized as another important target. The aim of this study was to assess the(More)
Susceptibility to vaccine-preventable diseases in Belgium in 2006 was estimated from a serum survey. Immunoglobulins against measles, mumps, rubella (MMR) and diphtheria at all available ages (1-65 years), and against tetanus in >40-year-olds, were measured by ELISA. Age-standardized overall seronegativity for MMR was low (3·9%, 8·0%, 10·4%, respectively).(More)
To inform current and future vaccination strategies, we describe the seroepidemiology of hepatitis B virus (HBV) infection in ten representative European countries using standardized serology that allowed international comparisons. Between 1996 and 2003, national serum banks were compiled by collecting residual sera or by community sampling; sera were then(More)
Influenza vaccination is less effective in the elderly compared to the young. Studies that have attempted to identify immune parameters correlating with satisfactory vaccine responses have yielded inconclusive results. Here, we correlate the distribution of different circulating CD4+ and CD8+ T-cell phenotypes with the humoral response to vaccination with(More)
OBJECTIVE To standardize serological surveillance to compare rubella susceptibility in Australia and 16 European countries, and measure progress towards international disease-control targets. METHODS Between 1996 and 2004, representative serum banks were established in 17 countries by collecting residual sera or community sampling. Serum banks were tested(More)
WHO–Europe’s goal is to eliminate measles and rubella by 2010 which will require a coverage rate of 95% for both MMR-vaccine doses. Belgian recommendations include a first MMR vaccine at 12 months and a second at 10–12 years of age. To survey MMR vaccination coverage, EPI two-stage random cluster samples of 1,500 toddlers (18–24 months of age), 900 primary(More)
OBJECTIVE We investigated whether and to what extent the uptake of the Human Papillomavirus (HPV) vaccine by girls aged 12-18 was related to the cervical cancer screening history of age-appropriate older female household members (assumed to be their mothers) in Flanders (Belgium). METHODS We studied administrative records on 127,854 female members of the(More)
In Belgium, rotavirus vaccination has been recommended and partially reimbursed since October 2006. Through a retrospective survey in 2012, we estimated the coverage rate of the rotavirus vaccination in Flanders among infants born in 2010. Using a standardised questionnaire, 874 families were interviewed at home, collecting information on demographic(More)
OBJECTIVE The objective of this study was to measure the coverage and influencing determinants of hepatitis B virus, measles-mumps-rubella, and Meningococcus serogroup C vaccination in 14-year-old adolescents in Flanders, Belgium, in 2005. METHODS A total of 1500 adolescents who were born in 1991 and were living in Flanders were selected with a 2-stage(More)
To assess changes in infant vaccination coverage in Flanders since 1999, an EPI-survey was performed in 2005. The parents of 1354 children aged 18-24 months were interviewed at home and the vaccination documents were checked. Several factors possibly related to vaccination status were examined with parametric and non-parametric methods. The coverage rate of(More)