A scientific article published in Current Opinion in Food Science states that zero risk does not exist in food processes. There will be some residual risk even that that risk may be very small.
The authors state "Consumers, food industries and governments typically desire foods that are ‘free of any risk’. In practise this is not achievable. Microorganisms are present in most environments, including the raw materials required for making food, the tools and machinery used to process that food, and even at the humans that are employed in food processing facilities and other food establishments (e.g. restaurants).......However, it does not matter how stringent these measures are [processes and procedures implemented by food operations], they can never be perfect. Consequently, a residual risk always remains, making zero risk in foods – as in many other aspects of life – unattainable in practice"
Certainly operations strive to minimize risk the best they can, and operations will have varying risk depending on the processes they use and the product they make. "In most food products, the risk per serving is virtually zero, resulting in a very low chance of the individual consumer contracting a disease. However, from a governmental perspective, the (expected) number of cases for products largely consumed can be relatively large, resulting in a relevant risk. Therefore, because zero risk does not exist for food products, the residual risk must be evaluated using the appropriate risk metrics."
Current Opinion in Food Science
https://reader.elsevier.com/reader/sd/pii/S2214799320301739
All food processes have a residual risk, some are small,some very small and some are extremely small: zero risk does not exist(Current Opinion in Food Science 2021, 39:83–92)