Loyalty cards offered by various businesses capture the food purchase histories of customers that can assist during an outbreak investigation. Analyzing purchase records of cases can assist investigations by identifying common foods purchased among cases, as well as details around suspect food items (e.g., brand, product details, date purchased). This information is also important for traceback investigations. These purchase records may also help identify food items that a case may not recall during a case interview.
You are able to obtain loyalty card information for three British Columbia cases and one Ontario case.
Based on the purchase records, you are able to confirm that the British Columbia case (BC-15) that reported consuming “Smile” brand chia seeds had purchased this product from a Healthy Lifestyle Emporium store. You are also able to confirm that the British Columbia case (BC-16) that reported purchasing chia seeds from a different Healthy Emporium store than BC-15, but could not recall the brand, had purchased “Smile” brand chia seeds. From looking at the purchase records of the BC case (BC-11) that reported eating chia seeds, but could not recall brand nor purchase location, you are able to determine that they purchased “Smile” brand seeds from a Healthy Lifestyle Emporium store. You are also able to confirm that “Smile” brand chia seeds were also captured in the purchase records of the Ontario case (ON-14) that reported eating this product.