Investigation of the claim will require the Delegate to decide whether or not the medical diagnosis – i.e. the condition suffered by the claimant – constitutes an injury, a disease, an aggravation (i.e. of either an injury or a disease), or a sequela to another injury or disease. Each of these different classifications has significance for its administration under the appropriate Act.

In particular, injuries and diseases have different formal criteria under the Act(s), for acceptance of liability. It is critical that Delegates distinguish correctly between them.