The Constitutional Court has denied British American Tobacco South Africa (BATSA) permission to appeal a court ban on advertising among and recruiting young people to the deadly habit.

Tobacco farming is harmful to the environment and to the farm workers with multinational tobacco companies contributing to the problem by exploiting local farmers, new research has revealed.

Chemotherapy, used to treat cancer, can damage healthy cells causing them to secrete a protein that sustains tumour growth and resistance to further treatment, according to a study published in the journal Nature Medicine.