Smoking on cigarette cases is harmful to health. How did it come into being?

The reason why smoking on cigarettes is harmful to health: an American grandmother's wife died of excessive smoking poisoning, and the grandmother took the cigarette factory to court. Finally, the International Framework Convention on Tobacco Control stipulates that the packaging of tobacco products must be marked with warnings that smoking is harmful to health, and its area should not be less than 1/3 of the visible part of the packaging.

There was once an American grandmother whose wife died of lung cancer due to excessive smoking, and the doctor identified it as nicotine poisoning. So, grandma took the cigarette factory to court in a rage, saying that the cigarette factory has the responsibility, knowing that cigarettes will kill people, why not mark it on the cigarette case? She wanted to remind the world, so she ran around the country for seven years, which was recognized by the court. It is also stipulated that in the future cigarette production, the words "smoking is harmful to health" must be marked on the cigarette case. The International Framework Convention on Tobacco Control stipulates that the packaging of tobacco products must be marked with warnings that smoking is harmful to health, and its area shall not be less than 1/3 of the visible area of the packaging.