And why is there no such terror group (and how do you know)? How much did it cost to create that killer virus in a lab - did it cost trillions, so that only ric

And why is there no such terror group (and how do you know)? How much did it cost to create that killer virus in a lab - did it cost trillions, so that only rich governments could afford to do so? I don't understand why terrorists shouldn't be capable of doing such a thing. Maybe the rationale is that they wouldn't be able to set up sterile lab environments, because we all know that terrorists live in dirty third world countries without hygiene?