Final answer:
To prevent the spread of illness, wash your hands regularly and keep your nails clean. Avoid communal surfaces like doorknobs and shopping carts.
Step-by-step explanation:
To prevent the spread of illness, it is important to wash your hands throughout the day and keep your nails clean. This helps remove dirt and germs that can cause illness. Additionally, avoiding communal surfaces like doorknobs and shopping carts can reduce the risk of coming into contact with germs.
Learn more about Preventing the spread of illness