About this study
This is an observational study investigating the effect that childhood vaccinations have on people's health. We are particularly interested in the BCG vaccine, as there have been variations in the age at which it is given to children over time and between different districts.
Project timeline

Potential policy impact
This study will help inform decisions about future vaccination policies.
Methods
We will be interviewing adults and children in population groups that may been affected by different immunisation policies. An initial sample will be recruited via centrally-held databases. We will then recruit individuals with similar characteristics who might also be willing to take part.
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