Why did lung cancer rates not increase until 1950's if

[junky_pal]

the? Inthe early 1920s, shortly after world war 1, smoking became fashionable for men. Why didnt lung cancer start increasing untill 1950?

[mattrunltd]

Dunno,........I remember I saw something about that a long time ago....I think they said it had something to do with pesticides,and that they couldn't find a direct link to lung cancer and smoking.

[whythefrowngirl]

How many yrs do you have to smoke till you get lung cancer? I've been smoking for 25 yrs and so far so good. It probably takes 30 - 50 yrs to get it. Also, the first person to respond to your Q nailed it with the lack of research, etc.