>>515055575
Before. It's preventive. Cells in your body become cancer every day, but either they self-destruct with a safety mechanism or your immune system kills them. In order for that to become a tumor, like 7 things have to go wrong. This vaccine would let your immune system recognize cancer better, so basically it improves the kill rate your body already has.
>>515055198
If you already have cancer a vaccine won't help. Your body already knows that you have a tumor and it's trying to fight it, but the tumor is too big and grows too fast, so it can't. Lack of immune system awareness is not the factor preventing you from fighting off cancer.