What is the DNA of survival?

what i think that the DNA of survival is that evolution is presented to us as a forward progression which are controlled by the mechanism named natural selection and the survival of the fittest. But when a survival trait is lost, it disproves both working mechanisms of evolution. For example champs have the ability to both resist AIDS and Alzheimer. Both diseases can kill, but some how during the evolution process they did not cross over to us humans and millions die every year because of it. Does that sound like the fittest are surviving, or dying? And the fittest being “natural selected” for their traits to survive through the death of the ones not able to survive? Evolutionist claim that a man evolved from a certain type fish grew a tail and climb tress. there are fish such as sharks that do not got cancer. how did that trait that kills so many, get lost during the evolution process? This problem, like the three million DNA base pairs problem, and it is hidden and not to be spoken of in our text books at least that what is says in the science of history. Evolutionists like to use the percent rate of our DNA being the same as chimps. So evolutionists are desperate to sell their theory to the public that they will leave this information out on purpose. Sometimes being successful and surviving means making connections with the right people and this takes kindness. you always want to have a good network of people that will help you out in life and this is needed because your parents will not always be able to look out for you. And that what I think of the DNA of survival