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This e-learning training was developed by the World Health Organization (WHO) and Walkgrove limited. It is intended to be used as a self-learning course on investigation of Adverse Events Following Immunisation (AEFI). The course is currently available in English only. The authors alone are responsible for the views expressed in this training package and they do not necessarily represent the decisions, policy or views of the World Health Organization.

All reasonable precautions have been taken by WHO to verify the information contained in this e-learning training. However, the e-learning training is being distributed without warranty of any kind, either expressed or implied. The responsibility for the interpretation and use of the e-learning training lies with the reader. In no event shall WHO be liable for damages arising from its use.

For training purposes only, the e-learning training contains maps with countries, names and locations which are fictitious and which are not intended to bear any similarity to actual countries, names or locations; any such similarity is purely coincidental.

The mention of specific companies or of certain manufacturers products does not imply that they are endorsed or recommended by the World Health Organization in preference to others of a similar nature that are not mentioned. Errors and omissions excepted, the names of proprietary products are distinguished by initial capital letters