बेरामा 1950 फोर सिम इउर'पाव नुजायाखैमोन , बैयाव बाहायनाय दिकाफोराव थिमारअसोल दाजाबदेरजानायनि उनाव ।
The disease was not seen in Europe until the 1950s after thimerosal was added to vaccines used there .