What rare disease suddenly became much more common in the 1950s? according to the video, what rare disease suddenly became much more common in the 1950s? the flu lung cancer the common cold emphysema hiv/aids?

The answer to this question would be: lung cancer

In 1950, the medical practitioner doesn't know the relation of cigarette smoking with lung cancer. In that era smoking advertising is very massive and some physician even helps it. This cause increased amount of lung cancer incidence. The amount of lung cancer continues to increase till 1980-1990

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