We are not really a single life form but a complex balance of bacteria and virus, eukaryote and prokaryote cells trying to live in homeostasis. What is human or not human is not simple. Where the ‘self’ starts and the ‘non-self’ ends is a blurry line.
Many non self cells play a vital role in the health of your immune system and gut.
This book is essential reading on everyone’s journey in understanding who they are as a human being.