When the asteroid crashed into Earth it spread a virus that affects human DNA making it unstable. All affected people would undergo mutations that would transform their bodies, a process that would take anywhere from a week to a month to complete.
Possible mutations are classified into categories:
Animal: The person changes species by becoming partially or wholly an animal. The change is only physical and the person retains their human intellect and memories even if they completely becomes an animal.
Gender: There is a change of sex, total or partial, in the infected person.
Plant: The infected person becomes wholly or partially a plant.
Body structure: This refers to the infected person having a small or extreme change in their body structure, with one body part becoming another, extra body parts growing elsewhere, or, in the most extreme cases, it becoming just one part. of the body itself.
Regardless of the category of change two things were certain. No one affected continued to age, making them immune to death from natural causes, with this, those who were already elderly end up rejuvenating, assuming an appearance that makes them appear to be at any age between 20 and 40 years. The other sure effect is the elevation of the affected person's libido causing the person to get horny constantly. The final libido level varies so that the lowest ones are already enough for the person to have to relieve at least two or three times a day, and in the highest ones getting horny so often that they have to take suppressants so as not to disturb their professional lives.
It is also possible for a person's change to fit into more than one category. A person who has already changed with the virus has unstable DNA and undergoes a new change from time to time.