Hepatitis B in Cystic Fibrosis and Latent Tuberculosis Respectively

CF patients are at risk for hepatic disease. Vaccination is recommended to all CF patients according to European consensus. The aim of the study is to vaccinate as many patients as possible and to follow up whether immunization has been complete.

Initially, healthy volunteers will be vaccinated to be compared with patients' antibody response to hepatitis A and B vaccine.

The connected part of this study is to vaccinate children suffering from latent tuberculosis against hepatitis B and to measure whether the immunization is related to specific interferon gamma response against Mycobacterium tuberculosis.