Answer:
They create genetic variations.
Step-by-step explanation:
Viruses have very different organism forms, since they do not have cells, but all have a capsule made of protein, where is the genetic material of these beings. This genetic material undergoes modifications, ie mutations, often leading to the emergence of varieties (subtypes) of the same virus, ie, these mutations create genetic variations. This makes it difficult to combat and compromises the effectiveness of various vaccines, which are prepared to combat specific types of microorganism. The ability to mutate genes is one of the characteristics that viruses have in common with living things.