Seroimmunity 2007 and Sub Study of the Swedish Population Regarding Vaccine Preventable Disease

Study Overview
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Brief Summary
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This is a randomized cross-sectional study of the Swedish population. Blood samples will be collected from a subpopulation in order to estimate the age specific sero-prevalence of the Swedish population for diseases included in the National Immunization Program (NIP), and to affirm the population's protection against polio. To be able to recommend complementary immunizations to immigrated children, a sub study focusing on foreign born teenagers will also be done and compared to children of the same age born in Sweden.

Detailed Description
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Besides the main objectives stated in the summary, the study consists of: Vaccine related objectives: To estimate the seroprevalence regarding vaccine preventable diseases in the cohort of children about to enter adulthood (as a receipt of the vaccination program's functionality), and thereby form a basis for decision-making regarding recommendations about continuous vaccination in adult age To evaluate the concentration of antibodies that full-term newborns receive from their mothers, and to estimate plausible consequences to optimize the schedule of the NIP for each vaccine preventable disease To, in different age groups, evaluate changes over time and concentration of antibodies compared to a study conducted in 1997 To evaluate plausible changes in the seroprevalence, for instance among children, related to an increased use of combined vaccines To document the age-specific seroprevalence against other diseases that will be vaccine preventable before start-up of new vaccination program To estimate the population seroprevalence against certain diseases against which vaccines have been developed during recent years and that might be introduced into the vaccination program within a couple of decades Method: Adults: one blood sample of 10 mL blood from vein in arm from each individual Children: one blood sample of 5-10 mL blood from vein or capillary in arm from each individual Cord blood: one blood sample of 10 mL cord blood will be collected from each newborn in connection with childbirth The objectives of the sub study are: To conduct the same type of analysis on foreign born 14-16 year olds as on 14-16 year olds being born in Sweden To also examine the immunity and infection situation with regard to Hepatitis B To conduct the corresponding examinations and priorities among the 14-16 year olds born in Sweden serving as control group

Official Title
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Seroimmunity 2007. Serological Study of the Swedish Population Regarding Vaccine Preventable Diseases Within the National Immunization Program (NIP), and a Sub Study Focusing on Foreign Born 14-16 Year-Olds.

Conditions
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Diphtheria, Tetanus, Pertussis, Polio, Haemophilus Influenzae Type B, Measles, Mumps, Rubella, Hepatitis B

Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: informed written consent (both groups) immigrated to Sweden after 6 years of age from a country with polio vaccination coverage < 85 % (Sub study group) living and attending school in Stockholm, Gothenburg or Malmoe (Sub study group)
Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Seroimmunity 2007<br>Cord blood from 400 newborns, 1800 children (2 - 18 years) and 2400 adults (above 18 years), randomly selected and stratified in age groups, from which blood samples are taken. | |
| Sub Study<br>800 immigrated children (14 - 16 years) from which blood samples are taken. | |

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Establishing the immunity situation among specific population groups, concerning diseases targeted by the NIP, by measuring antibody levels in serum using methods In-house ELISAs, Neutralization test (NT) and ELISAs from Dade Behring |  | 3 years | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| To confirm the protection against polio among the Swedish population by measuring antibody levels in serum using NT against Polio virus types 1-3 |  | 3 years | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Diphtheria, Tetanus, Pertussis, Polio, Haemophilus influenzae type B, Hib, Measles, Mumps, Rubella, Hepatitis B, Vaccine, Vaccination, Immunity, Vaccination program, Sweden, ELISA