Der foreligger ingen tilfælde, hvor det er fastlagt med sikkerhed, at reaktionerne faktisk skyldtes vaccinen, men oplysningerne tyder på, at nogle af tilfældene kunne have være udløst af mæslingevacciner.
In no case has it been shown conclusively that reactions were actually caused by the vaccine; however, the data suggest the possibility that some of these cases may have been caused by measles vaccines.