@Wormwood @BigTLarrity Here's something to consider: the US Navy ran a bacterial experiment to determine the fountainhead of cross contamination inside a kitchen, everyone taking part in the experiment knew what was going on and followed the rules of food preparation to the letter, yet bacterial contaminates were still found in the food.

They discovered that one of the cooks had long forearm hairs, and traces of human faeces were present on the hairs which dried in close proximity to the stove and became a poop duster over any foodstuff he was working on.

It gets worse: became human solid waste is quite oily, standard handsoap is too mild to remove the traces of faeces which collect on the arm-hairs when someone wipes their bottom. A stronger detergent would irritate the skin of the kitchen workers and make life impossible.

The Allen Experiment in the 1930s demanded that all cooks, porters and medical staff have shaved hands and forearms.
Allen's measures were dropped after WW2 as a kind of outdated Elitist attitude towards the lower ranks. Right around the time when ship doctors could administer antibiotics to sailors with food poisoning.

Now imagine the hairy paws and forearms in every fast food place you have ever visited. Half of them probably take a shit, don't wash and just slap on a pair of latex gloves.