Here's the film's description, thanks to Deadline...
In "Patient Zero," an unprecedented global pandemic of a super strain of rabies has resulted in the evolution of a new species driven by violence. An inexplicably immune human survivor with the ability to communicate with this new species must spearhead a hunt for "Patient Zero" in order to find a cure to save his infected wife and humanity.
In addition to these zombie (or, in this case, infected) flicks, Smith is starring in Paramount and Skydance’s "Terminator: Genisys" as well as the Ryan Gosling-directed, "Lost River."
No release date has been set for "Patient Zero" and "Pride and Prejudice and Zombies" is still filming. We'll keep you posted on release dates.