when did they start putting warnings on cigarette packages
Tobacco packaging warning messages In 1966, the United States became the first nation in the world to require a health warning on cigarette packages.[45][46]
Cigarette filter From 1935, a British company began to develop a machine that made cigarettes incorporating the tipped filter. It was considered a speciality item until 1954, when manufacturers introduced the machine more broadly, following a spate of speculative announcements from doctors and researchers concerning a possible link between lung diseases and smoking. Since filtered cigarettes were considered "safer", by the 1960s, they dominated the market. Production of filter cigarettes rose from 0.5 percent in 1950 to 87.7 percent by 1975.[6]