Some important aspects of what evidence we might expect to find if the bible's history is true, shall now be explained but it will require thinking it through properly.
So then evidence is usually what consequently follows. (Thereby expressed as the consequent.) As Mike (Summers) rightly points out to us, "evidence is the effect".
In particular I would say that if the bible history was true, since Genesis says all things were created, "very good" and all animals were herbivore, etc...then obviously it is a valid question to then ask, "then why is there disease, etc..?"
So because Genesis doesn't say God created disease as such, but only the spawn of them in shall we say, harmless or symbiotic form then obviously the bible is stating two very important claims which may not be all that easy to initially spot;
1. Genesis is saying at the beginning creatures/life were created.
2. Genesis is saying that disease and suffering wasn't created by God.
Think about it, God didn't say, "and let the disease-bearing vessels come forth and multiply so man can catch leprosy and malaria and HIV." In the beginning there were no such harm-causing agents.
So then, if Genesis is saying those two things, as evidence in this world, what should we find?
After a while the answer should hit you, I would prefer you think about it yourself before reading this next part but if you are lazy here it is; Obviously in history, we should find as evidence consistent with a biblical history, that animals have been here since the beginning but that disease originates in time.
Can you see my point? If God didn't create disease then we wouldn't expect the majority of diseases to be present at the beginning of human history but we would expect them to come about later than creation, and for the animals, fish, reptiles, mammals, etc, we would expect obviously these animals to be present at the beginning of human history.
So then think of all of the diseases in the 20th century that occurred such as mad cow disease, a human-caused disease. List them all, now list all of those diseases originating in the 19th century, then go back more and more, how many originate in time?
As you can see, if these diseases came about in those centuries, then 1. atheists are wrong to blame God for creating them. 2. This is the exact pattern we expect from a biblical history; we see throughout written history all kinds of animals which exist today, which are spoken of or depicted, for as long as human history, what we don't see is certain diseases going as far back.
Some well-known inherited genetic disorders include cystic fibrosis, sickle cell anemia, Tay-Sachs disease, phenylketonuria and color-blindness, among many others. All of these disorders are caused by the mutation of a single gene
Inherited diseases are caused when "natural selection" cannot get rid of them. Mutational load means that generation after generation the accumulation of genetic errors occur. As biblists we would see a lot of such diseases occurring well after the fall given the rate of such mutations initially would be extremely low. The mutational load now is billions, all of humanity carries all of the mutations collectively, and each person has a massive mutational load from previous generations, which the first humans would be clean of. The list of genetic disorders is extensive.
Understanding my argument; You have to remember diseases need certain conditions to arise, which is why it is logical to believe that even if many diseases can be traced back a long way, the simple fact is that the conditions conducive to those diseases arising first must exist. This usually requires a process of some time. With genetic diseases you have to wait until the mutations occur, which provably will take generations, it would be highly silly to believe all such genetic diseases arose within the first few generations of human life for example.
A few harmful microbes, for example less than 1% of bacteria, can invade our body (the host) and make us ill. Microbes cause infectious diseases such as flu and measles.
There is also strong evidence that microbes may contribute to many non–infectious chronic diseases such as some forms of cancer and coronary heart disease. Different diseases are caused by different types of micro-organisms.
Note that less than 1% of bacteria causes the problems, indicative of a realistic scenario that 100% at the beginning were not causing problems. It is realistic to believe 1% has went wrong when we consider how disease begins. A lot of the time it seems some diseases are simply "out of place" if certain hosts they lived off of, no longer exist or they somehow end up in the wrong host. It has been proven that some diseases in certain hosts, don't cause any harm, but in human hosts they may cause harm. Essentially this makes sense, if all diseases were originally in the correct host. So then when we think how unsanitary conditions of poor people caused disease for example, we can see that a lot of disease doesn't have an origin in time but is caused when certain incorrect conditions are met, which interestingly, the law books of the bible said to steer clear of by washing of hands and quarantine, etc....
The vikings suffered from massive intestinal worm infestations. This article shows how many complex factors can arise when certain detrimental selections occur to fight certain diseases but can lead to being vulnerable in other areas;
(m)"The Lord prepared a worm." - Book of Jonah.(/m)
(m = mischief content)
Disclaimer; Even ancient disease surely has it's origin either in time or wherever the circumstances arise that are conducive to causing them. It seems logical to believe that because either or both seem to cause disease, God didn't specifically create disease at the beginning since either the conditions required require time to happen or the genetic defects require time to happen. Be it 4 months, 4 years or 400 years, time is required, and "at the beginning" was the beginning of time, when God said He created, NOT after creation week.