Fungals
Fungals are the aftermath of the biological warfare. Altering beings genetics with fungal infections that changed their appearance and entire genetic makeup.
Fungals are sentient and have a mind of their own. However are far more frail than the other species. Their bodies being made of at most a hard skin like material that can protect them from some cuts and blunt force trauma. However isn’t very effective with their lack of muscles and bones in most cases. Making them one of the weakest species.
Fungals are the most populated on Earth, making up of 14 billion on the planet. Taking up most of the regions fit for fungi. Using spores, or in some cases sexual or pod reproduction. Depending on the variant of Fungal. Not also having a define appearance. Some may look human or completely fungus ridden.
Some Fungals can speak or even have a higher level of intelligence. Most of them being peaceful and secluding to themselves. The largest colony of them in North America being in the American midwest. Mainly infecting the local plant life and some of the wild life to secure enough biomass to survive. Though they can infect other species, they control their infection spores within a gland within them that they can choose to release or not.