S2. Why is it so difficult to transmit cancer prevention goals to society?

摘要

It is estimated that over half of all cancers could be avoided through changes in lifestyle. Despite some significant achievements including a reduction in the numbers of people smoking (at least in developed countries) there is no doubt that there has been a failure to effectively target "hard to reach", disadvantaged populations. With the looming "obesity epidemic" there is a clear need to understand why health promotion messages are not as effective as we might wish and how we might improve this situation.