According to a survey, more than one out of four people in Ireland is believed to be smoking in non-smokers with lung cancer.
The findings, which mark the start of the International Month of Lung Cancer Consciousness, come as a human being who died from lung cancer, says that society should be less subjective than those suffering from this disease.
A survey of 1017 adults on behalf of the Mary Keating Foundation, "I have lung cancer," found that 27% of the population believe that non-smokers with lung cancer should be a priority for those who smoke.
It also found that 17% believe that health insurers should not include lung cancer patients who smoke, and 34% of adults agree that lung cancer patients face the social stigma that other cancer patients do not occur.
One in ten said that it was acceptable.
This year Venice's broadcaster quickly lost her husband Martin to lung cancer.
With the launch of the Marie Keating Foundation campaign, Mrs. Rapid spoke about how stigma and judgment may be felt.
"When someone is diagnosed with cancer, it's a tragedy, no matter what cancer is. We all choose a different way of life. Cancer is not one of them.
"When you take care and care for someone you love with lung cancer, it's hard to hear these guilty and convictions. We need to be less subjective when someone is ill with lung cancer.
No one wants to get cancer, and anyone can get it. "
Managing Director of Marie Keating Foundation Liz Yeates, who dies from lung cancer every year than any other cancer.
"Many people have an idea of what they consider to be a lung cancer patient, but this campaign reflects the diversity of people it can affect. We want to change the talk and melody of lung cancer from one judgment to one from empathy and support."
The survey found that 16% of respondents were aware of signs and symptoms of lung cancer compared to 31% who said they were well-informed about breast cancer and 26% of skin cancer.