Causality Assessment of Adverse Events Following Immunisation: Why it needs to be revised urgently

First published at 13:56 UTC on May 9th, 2021.

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crwriter1

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The World Health Organisation (WHO) has recently revised how adverse events after immunization (AEFI) are classified. Only reactions that have previously been acknowledged in epidemiological studies to be caused by the vaccine are classified as a va…

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