Professor John Kennedy

But we have to decide who to give them to.

They're very, very expensive.

So, yes, a lot of these immune therapies are available, but others are not.

The major factor pushing the increase in the amount of cancer out there is the increase in the size of the population and the ageing of the population.

The actual individual cancer rates per head of population or per age group is not greatly increased except perhaps for melanoma to some extent.

Because we all staked ourselves out on the beach in Greece and covered ourselves in olive oil back in the 70s and 80s.

The incidence is increasing because the population is increasing.

But the actual rates per head of population are not greatly different.

That's a very important point.

There's no doubt about it.

Lifestyle is incredibly important for cancer incidence.

I mean, if you go back 200,000 years, you know, people didn't live to be 80.

They ran around a lot, they didn't get obese, and they were probably eaten by something when they were 25.

So we didn't have a lot of cancer.

Cancer is a lifestyle disease associated with aging.

But it's increased by obesity, it's increased by alcohol, it's increased by lack of exercise, by exposure to ultraviolet light, and by smoking particularly.

So there's a huge lifestyle implication for cancer.

I would like to make one point, which is very interesting, and you've just brought it up there.

There's a substantial increase all through the Western world.

in younger patients with certain cancers, particularly colorectal cancer.