A manager is training staff on personal hygiene. Which everyday habit is the single most effective way to prevent the spread of foodborne pathogens by employees?

解析

Frequent, correct handwashing at the right moments is the single most effective personal-hygiene control against foodborne illness, since hands are the main vehicle for transferring pathogens to food. Cologne only covers odour and does nothing to a pathogen, and gum-chewing is prohibited in prep areas because it moves saliva to the hands and food. Long polished nails harbor pathogens and can chip into food, so the Code keeps nails short, clean, and unpolished unless gloves are worn.