

I think the purpose of giving it to people who are at high risk of the cancer make the auto-immune risks later a thing they will at least be alive to run into later; and maybe a fix for that will be found in time.
This is a vaccine, not a cure. They are given this before they even get cancer, and it’s very possible that they weren’t even at risk for pancreatic cancer in the first place. But, the vaccine could be worse than the cancer, if it doesn’t cure a cancer that never developed and then also triggers some auto-immune response.
Hi, welcome to c/science. If you haven’t developed an immediate pessimistic response to all science news, you clearly haven’t been here long enough.
This seems less like a vaccine for pancreatic cancer and more like a vaccine for the cause of pancreatic cancer, like HPV’s relationship with cervical cancer. A subtle, but important difference, as that’s less experimental than “a vaccine for cancer”.
Although, targeting precancerous lesions that were created by their own body is still rather more experimental than targeting a completely foreign virus.