If germs affect the human body negatively, is there any way that they can be altered to affect it positively? like to – Search I'm a Scientist. Get me Out of Here!

Question: If germs affect the human body negatively, is there any way that they can be altered to affect it positively? like to help the human body instead of negatively affecting it?

Asked by on 14 Nov 2019.

Question: If germs affect the human body negatively, is there any way that they can be altered to affect it positively? like to help the human body instead of negatively affecting it?