Final answer:
To prevent cross-contamination, masks should be removed by the sides using the ear loops or ties, ensuring the contaminated front of the mask is not touched.
Step-by-step explanation:
To prevent cross-contamination, masks should only be removed by the sides. When handling a mask, the front of the mask is considered contaminated, especially after prolonged use in public or clinical settings. To safely remove the mask, one should only touch the ear loops or the ties (strings). Grasping the sides can help avoid contact with the front, and hence, minimizes the risk of transferring pathogens to the hands or face.