A kitchen worker prepares a drink made of fruit juice for the guests. She is wearing gloves and a cloth mask to cover her face. The work surface is clean, too. How can cross-contamination occur in this scenario? The worker scratches a wound or a rash on her skin with a gloved hand and continues preparing the drink without changing the gloves. The worker sneezes into the drink and wipes her mouth with her sleeve. The worker hasn't washed her face with a bar of soap. The fruit juice has not been boiled to remove pathogens.

Cross-contamination can occur in this scenario if the worker scratches a wound or a rash on her skin with a gloved hand and continues preparing the drink without changing the gloves. This can transfer bacteria from the wound to the drink, potentially contaminating it. Additionally, if the worker sneezes into the drink or wipes her mouth with her sleeve, this can also introduce pathogens into the drink. It is important for the worker to practice good hygiene and follow proper food safety procedures to prevent cross-contamination.