In 2048, A woman named Reginae Mack, who had fallen from grace due to increasing isolating herself from her peers, press, and family due to the aftermath of tragedy, creates the first "manimal", as part of a project designed for manual labor in a modern environment, and also is a landmark by being the first man-made species. However, 4 of the experiments made unintentionally gain sentience, and in 2060, escape from captivity into the urban world, struggling until a few people take them in.
Season 4 of The Virus Within
Trinity is familiar with zombies, being one herself, but when strange zombies start appearing, she realizes that the world she knew might be changing yet again.
When a dangerous set of scientific notes are discovered, Trinity and her friends don't realize anything is wrong until a frantic radio call comes in. Unaware of the notes, they race to the south and struggle to determine where the strange zombies came from. The zombies are unlike any ranks previously seen, and they aren't as predictable. Some have new tricks hidden up sleeves, forcing any Stronghold they encounter to quickly adapt to the new challenge or risk being overrun. Secrets never remain hidden, and zombie apocalypses never make life easy.