Evolutionary medicine
DNA is split and copied almost 2 trillion times a day. Because DNA is copied so many times, mutations can occur.<ref></span>DNA replication: https://phys.org/news/2018-06-short-dna-replication.html#:~:text=The%20DNA%20in%20each%20human,and%20give%20rise%20to%20disease. </ref> This means that diseases like cancer are not able to be removed from the human population.