Workers can contaminate food through poor hygiene practices like working while sick, not washing hands properly, or touching hair and then food without a barrier. Proper handwashing technique and frequency is essential to prevent contamination. Workers should wash hands after using the bathroom, coughing/sneezing, eating/drinking, switching tasks, and other situations. Fingernails, cuts, wounds and sores can harbor bacteria and require policies like wearing gloves. Food workers exhibiting vomiting, diarrhea or jaundice must be excluded and those with sore throat and fever may be restricted to non-food handling tasks.