Of course, a healthy immune system wards off sepsis without strain, but a patient whose immune system has failed will be unable to fight the infection, just as they are unable to locate and destroy cancerous cells.
Remember: we all have cancerous cells in our bodies. Every single day, you have cancer. But every single day, your body cures it and leaves you in a state of health. Classical "cancer" is simply a convenient label given to a set of symptoms that appear when your body stops curing its own cancer.
That's usually caused, by the way, by dietary factors such as following the standard American diet of processed foods, soft drinks, red meat and cow's milk.
Here's something else that's really sad about all this: the cancer treatments promoted by western medicine are precisely ones that suppress the immune system and leave the patient even more vulnerable to infections and cancer! Chemotherapy, for example, practically destroys the immune system. So does radiation treatment. These treatments are barbaric, if not downright criminal. Neither have any scientific merit whatsoever and have never been shown to actually increase the lifespan of patients. What doctors need to be doing is supporting patients' immune systems, not destroying them. Seems like common sense, huh? But then again, hospitals can't bill patients for dispensing common sense.
Instead, they are thinking that maybe these cancer patients just need more antibiotics! Talk about medical insanity...