Possibly keeping an eye on this. However, I do want to point out that "death via heart wound" seems like an easier way to kill zombies if you do indeed make this a modern setting. Sure, a heart is a small target, but soldiers are already trained to shoot at center mass/chest, which is where the heart is located. Not really sure how fast the virus would be able to spread that way when they can just dump ammo into the chest and hope they land a shot instead of having to fight their mindset of aiming center mass, which is typically cited as a reason why the military falls.

If you'd still want to keep the whole heart weakness though, I suggest maybe looking at Kabaneri of the Iron Fortress. The zombies there die the same way but they're fighting against people with swords and steam-powered guns in industrial-era Japan.