In the US, the Maine Center for Disease Control traced and confirmed on June 21 that all the nine cases of Hepatitis A infection reported in Aroostook County are linked to the first instance of the virus found in a Caribou restaurant worker on May 17.This is an example of what the approach should be to public health.Messages

• Every preventable death should be audited.
• Every index case of an infectious disease should be traced and followed to prevent next infection.