Tobacco package warning messages are warning messages that appear on the packaging of cigarettes and other tobacco products concerning their health effects. They have been implemented in an effort to enhance the public's awareness about the harmful effects of smoking. In general, warnings used in different countries try to emphasize the same messages. Such warnings have also been required in tobacco advertising. The earliest mandatory warning labels on cigarette packaging were implemented by the United States in 1966. The first pictogrammes were implemented by Iceland in 1985, the first pictures by Canada in 2001.