Thanks for your question.
Please read the below linked document from WHO which clearly states that there is no causal relationship between hepatitis B vaccine and GBS.
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These are all case reports and not studies. Based on large number of studies WHO has concluded that there is no causal relationship between hepatitis B vaccine and GBS, and you may find this in the above linked document from WHO.
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Yes there have been case reports, but causality has not been established.