She died of a continual increase in senescent cells.So 10% have no other major diseases?
My mother died at age 96
She had colon cancer.
She had successful surgery removing the carcinoma.
She had a stroke post op and went unconscious.
She lived about 5 days after surgery.
She recovered from cancer? Died of a stroke?
Over half of the COVID-19 deaths have come from the nurcing home population where the life expectancy is 12 months or less under normal circumstances.Large number of Wuhan Fru deaths had a low chance of living another year without getting infection.
Good question.Back to your question. How many long term heavy smokers are in the non survivor group which just can't tackle a tough respiratory disease?