Lawrence Joseph Bader's Eyepatch

Origin
Lawrence Joseph Bader, (1926 – September 16, 1966) was a cookware salesman from Akron, Ohio, who disappeared on a fishing trip on Lake Erie on March 15, 1957. Bader was found alive five years later, as John "Fritz" Johnson, a local TV personality living in Omaha, Nebraska. He wore an eyepatch after surgery to remove a cancerous tumor from his left eye. The transformation from in debt family man to popular bachelor was unknown until his niece’s friend one day spotted him at an archery contest, confirming it to be Bader.

Effects
The user will be affected by a period of amnesia. Only memories of personal events will be erased, not established facts outside their own prior lives. To fill the void, the user will wander around the area to regain their memory. In reality, their surroundings are shaping the imaginative and memory centers of the brain, providing them a detailed and false history. The longer it is used, the stronger a person will believe in those made-up memories. The amount of time deleted can vary anywhere from minutes to many years of backstory.

The effects make anyone who is a salesperson, from Akron, Ohio or heavily in debt to the IRS contagious. They become the patient zero, spreading amnesia to others. This amnesia is somewhat weaker than the original, since the first victim can periodically access their true memories.