This will differ from person to person. Because it's more of a question of morals and ethics. Let' say your going home one day and some one sees you and runs to you. They give you a tiny vial and tell you a story. The goverment had create a liquid virus that turns people into zombies. He runs of and gets hit by a car and dies. You focus on the vial. You have the power to infect anyone and cause the zombie apocolpyse or jut a small outbreak.
So you go to city hall, where everythings controlled(lets just say). Now you have two options you can release the virus assuming you'll be fine afterwards and be able to escape, or you can destroy it with the goverment help, but that would mean there would never ever be even the slightest chance that there would be a zombie apocolypse.
Before answering consider some of these few things. Let's look at how alread war-torn our world is. This could stop war on humans and focus it on zombies. Or die fighting each other. What about sex and prenaucey? If a newborn starts screaming, wouldn't that attracted a ghoul to you? What about the enviroment and technology, wouldn't the enviroment get a chance to heal fro mthe damage humans have done to it? Consider, the pros and cons.
I think I would release the virus onto earth. This may be evil but we the lose will come a stronger future then death by global warming or some other fucked up thing like nukes. Just giving humanity a fighting chance.
what about you?