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Coincidence is not causality—a principle which needs regular rediscovery
  1. ULRICH HEININGER, European Associate Editor

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After the long debates on the safety of pertussis whole cell vaccines had finally been settled1 (they had been accused of causing severe brain damage in a subset of vaccinated infants and young children), new trouble recently arose with reports on the perceived side effects of immunisation.2-4

It was not enough that for almost two decades hundreds of thousands of children had to suffer unnecessarily from whooping cough and its complications after scares among lay persons and professionals fuelled by case reports and reports in the media on serious post immunisation illnesses. This led to under or non-use of the vaccine in many European countries, primarily Germany, …

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