[why do babies get diseases, etc.]

 Here's the (main) problem. The scenario you outline is reasonably 
consistent, but all the evidence that I am familiar with not only does
not support it, but indicates something far different. The Earth, by
latest estimates, is about 4.6 billion years old, and has had life for
about 3.5 billion of those years. Humans have only been around for (at
most) about 200,000 years. But, the fossil evidence inidcates that life
has been changing and evolving, and, in fact, disease-ridden, long before
there were people. (Yes, there are fossils that show signs of disease...
mostly bone disorders, of course, but there are some.) Heck, not just
fossil evidence, but what we've been able to glean from genetic study shows
that disease has been around for a long, long time. If human sin was what
brought about disease (at least, indirectly, though necessarily) then
how could it exist before humans?

[deletions]

 Uh... I know of many evolutionary biologists, who know more about
biology than you claim to, who will strongly disagree with this. There
is no evidence that the human genetic code (or any other) 'started off'
in perfect condition. It seems to adapt to its envionment, in a
collective sense. I'm really curious as to what you mean by 'the
degeneration of the genetic code'.


 Umm. Nah, we seem to do a pretty good job of adapting to viruses and
bacteria, and they to us. Only a very small percentage of microlife is
harmful to humans... and that small percentage seems to be reasonalby
constant in size, but the ranks keep changing. For example, bubonic
plague used to be a really nasty disease, I'm sure you'll agree. But
it still pops up from time to time, even today... and doesn't do as
much damage. Part of that is because of better sanitation, but even
when people get the disease, the symptoms tend to be less severe than in
the past. This seems to be partly because people who were very susceptible
died off long ago, and because the really nasty variants 'overgrazed',
(forgive the poor terminology, I'm an engineer, not a doctor! :-> ) and
died off for lack of nearby hosts.
 I could be wrong on this, but from what I gather acne is only a few
hundred years old, and used to be nastier, though no killer. It seems to
be getting less nasty w/age...


 Now, wait a minute. I have a question. Humans were created perfect, right?
And, you admit that we have an inbuilt abiliy to fight off disease. It
seems unlikely that Satan, who's making the diseases, would also gift
humans with the means to fight them off. Simpler to make the diseases less
lethal, if he wants survivors. As far as I can see, our immune systems,
imperfect though they may (presently?) be, must have been built into us
by God. I want to be clear on this: are you saying that God was planning
ahead for the time when Satan would be in charge by building an immune
system that was not, at the time of design, necessary? That is, God made
our immune systems ahead of time, knowing that Adam and Eve would sin and
their descendents would need to fight off diseases?


 Here's another puzzle. What, exactly, do you mean by 'perfect' in the
phrase, 'created... perfect and without flaw'? To my mind, a 'perfect'
system would be incapable of degrading over time. A 'perfect' system
that will, without constant intervention, become imperfect is *not* a
perfect system. At least, IMHO.
 Or is it that God did something like writing a masterpiece novel on a
bunch of gum wrappers held together with Elmer's glue? That is, the
original genetic 'instructions' were perfect, but were 'written' in
inferior materials that had to be carefully tended or would fall apart?
If so, why could God not have used better materials?
 Was God *incapable* of creating a system that could maintain itself,
of did It just choose not to?

[deletions]

 My main point, as I said, was that there really isn't any evidence for
the explanation you give. (At least, that I'm aware of.) But, I couldn't
help making a few nitpicks here and there. :->

Sincerely,