Smoking causes lung disease.
High credibility as this was an immediate consequences of smoking that all smokers have experienced. Smokers relate to the shortness of breath and energy loss from smoking. Most smokers can identify with being suddenly out of breath doing something that was easy before they started smoking.
See "Testing New Health Warning Messages for Cigarette Packages A Summary of Three Phases of Focus Group Research (Government Report), Canada, 2000"
• Royalty-free license
• No time limit
• For use of health warning on tobacco products
• “Health Canada” attribution to be removed
• Additional licensing agreement for pre-test purposes is required