This study confirms a causal association between idiopathic thrombocytopenia purpura and the MMR vaccine.

PMID: 

Arch Dis Child. 2001 Mar ;84(3):227-9. PMID: 11207170

Abstract Title: 

Idiopathic thrombocytopenic purpura and MMR vaccine.

Abstract: 

A CAUSAL ASSOCIATION BETWEEN MEASLES: mumps-rubella (MMR) vaccine and idiopathic thrombocytopenic purpura (ITP) was confirmed using immunisation/hospital admission record linkage. The absolute risk within six weeks of immunisation was 1 in 22 300 doses, with two of every three cases occurring in the six week post-immunisation period being caused by MMR. Children with ITP before MMR had no vaccine associated recurrences.

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