There is a specific federal rule for this exact situation. The Food Traceability Rule requires companies handling high-risk foods to keep records that let an investigator follow a head of lettuce back through the distribution chain to a farm and a lot, quickly. It is the answer to the question every produce outbreak raises, which is why it took so long to find out where the food came from.
Its compliance date was pushed from 2026 to 2028 [1]. Two years.
What makes the delay legible is what is happening in those two years. Since May, more than 11,000 illnesses have been reported across 41 states. Tied to Taylor Farms de Mexico iceberg lettuce: 1,947 lab-confirmed cases and 98 hospitalisations [2].
The traceback that would use the rule's records is running right now, without them.
It is not the only thing that moved. CDC's food-parasite tracking staff went from 11 scientists to 3, and FoodNet narrowed from eight tracked pathogens to two, dropping cyclospora - the produce parasite - entirely [1].
Read together: the surveillance that finds an outbreak got smaller, and the rule that traces it got later. Neither decision mentions the other, and the outbreak does not care.
