You have figured out intuitively, that you need not wait until an organism gets a foothold in the body and causes a problem, to go to work on it to shift it into a safer mode of existence for being around human beings. You can indeed reach out to the broad world of organisms of all kinds to be proactive in making similar changes everywhere, and this will begin to reduce the numbers of dangerous pathogens, parasitic adversaries, and pests of all kinds, because their makeup can be muted or altered in ways to change their lifestyle and adapt them accordingly, so they need not prey on human beings. And that is a perfect illustration of a prophylactic benefit that is easier to accomplish than the healing of millions of human beings infected by pestilence. As you know, it is easier to prevent harm than fix what is broken.
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