you could look at the science of why viruses are not contagious..they dont have a digestive system. so they are not alive in that sense..they are produced by cells when to use bacteria or fungi who are alive would be killed by the toxins so an inert substance..i think of sponges mops up the toxins and is excreted..we have millions in our body and if they were alive we would all be dead! they cannot exist outside the body... this is a simplified version but just because you cant understand it you wont even look at it isnt very grown up is it?