Whats the point of being ill?

Feeling ill is actually your body healing itself, so it is a darwinian+, since your body adapts.
Why the feeling is there is because it is a strain on your system. Why the feeling have not been “edited” away is there because it makes you aware that you need fixing, IIRC
So without the feeling you could go long without beeing fixed, wich is a negative thing :)

Plus we’re not the only ones evolving! Viruses are constantly changing and mutating and this is why being immune to old versions of viruses doesn’t help when a new strand emerges.

I detect an assumption that we are the highest stage of evolution and should be able to fight off disease. Evolution did not stop with humans. All those pathogens that infect us evolved with and continue to evolve.

It’s the classic Red Queen argument. We adapt to fight off a virus, the virus adapts to infect us better. It keeps the two organisms in a kind of equilibrium.

Here’s some more information about the Red Queen Principle.

Also, Evolution can only work with what it’s got to work with. If I don’t have yarn or knitting needles, for example, I can’t knit a sweater. For evolution to “work toward” making us free of illness, a person (preferably a good many people) must somehow mutate into being disease-free. Then, those people must outbreed the people left who still get sick. This works best at population bottlenecks, where the better-off survivors can only breed with each other and fill up the vacancy. As it is, there’s a whole heaping lot of people around who are all breeding like crazy, and I bet that it’s too much for a theoretical pair of disease-free mutants to tackle – especially in the short run.

There are cases of people adapting to defeat certain illnesses, though! For example, there is a subgroup of people of Northern European descent who are naturally immune to the AIDS virus. If AIDS took out everyone else, these people would live and breed and the resulting generations would be largely free of AIDS. Also, my blood type is AB, which makes me part of the lucky small percent of people that are resistant to cholera.

But… the point of being ill? It has very little to do with people, actually. It’s the bugs’ way of making their living. We just happen to be convenient bags of nutrients.

Humans evolve.

Diseases evolve as well.

What enzo said. It’s a race that we’re running against germs.

In Alice Througt the Looking Glass, the Red Queen actually said, ”“It takes all the running you can do, to keep in the same place.” I love learning that it’s been turned into a principle.

As laureth said, it has more to do with the virus than us.
They live and reproduce in our body, but the illness is the result of our bodies fighting back and becoming stressed. We can’t just become immune to something that changes as much as our immune system does, it’s a constant battle.