Why is cross-contamination a major concern in food safety?

Cross-contamination is a significant concern in food safety primarily because it can facilitate the transfer of harmful pathogens from one food item to another. This can occur through direct contact between contaminated and uncontaminated foods, or indirectly through tools, surfaces, or hands that carry these pathogens. When pathogens are transferred, they can lead to foodborne illnesses, posing serious health risks to consumers.

Considering the other options, increased cooking time does not directly relate to cross-contamination. Cooking time is typically determined by the type of food and its internal temperature, not contamination levels. Additionally, while flavor enhancement and cost reduction are important in food preparation, they are not relevant to the issue of cross-contamination. The focus on preventing cross-contamination is crucial for maintaining food safety and ensuring public health.