We know so little about biology that the only way to do it is test on humans.
In another comment I said that if the area of biology/microbiology etc were the size of the surface of our sun, the area of our knowledge in those subjects would be perhaps a square millimeter.
And if you think that’s bad, don’t get me started on higher level areas like neurology.
In another comment I said that if the area of biology/microbiology etc were the size of the surface of our sun, the area of our knowledge in those subjects would be perhaps a square millimeter.
And if you think that’s bad, don’t get me started on higher level areas like neurology.