[kulahan]

Preventing cancer seems like a fool's based on my understanding of the disease. You have cancerous cells in your body every single day. Your immune system kills them all off. It's like saying you want to prevent all bacteria from entering your body. It's just not realistic (at least, not right now).

[tyingq]

He gave a couple of examples. Another one is aggressively treating GERD so that it doesn't devolve into various conditions that lead to stomach or esophageal cancer. It's possible something like this could treat pre-cancerous things too, like Barrett’s esophagus.

[foobiekr]

Replying to a post noting a 90% reduction in cancer thanks to the HPV vaccine with "preventing cancer seems like a fool's errand" is pretty amazing. Would you care to expand on that?

[kulahan]

HPV is a carrier disease for one strain of cancer. Cancer is a type of disease - as said elsewhere, it's like saying "I found a cure for virus".

[inglor_cz]

Maybe the OP meant "prevention" in the sense of "improving your immune system so much that cancer never manifests as a disease".

[foobiekr]

HPV causes cancer. The prevention here is literal - by preventing infection from the oncogenic HPV variants there is no cancer.