No. The basic premise does not make sense.
A disease which is always transmitted by a bite, and always fatal? No.
That always brings them back to life(ish), and makes them attack people? No.
That makes them stop attacking people before seriously damaging them so the victims are intact enough to get up again? No.
That makes them ignore thermodynamics and basic biology? Definitely not.
The zombies walk round using their muscles, right? So those muscles need fuel and air same as living ones, you need blood to transport that, air to oxygenate that, a heart to pump that...just like a living creature. You need them to eat things for fuel, drink to stay hydrated. Zombies don't do that.
But, ok, given all that, they still aren't much of a threat. Remember WW1, hordes of infantry armed with bayonets running at troops with machine guns and bolt action rifles, and how that doesn't really work?
Well, this time they don't have bayonets and they can't run or even think for themselves, and they don't have artillery or anything to soften them up first, and the enemies troops are much better equipped. Not going to work.
For zombies to be a threat, their opponents need to be utterly rubbish.
...
Now, there are some decent 40k zombies, where a dead soldier will come back able to use his/her weapons and work with other zombie soldiers, under the command of intelligent undead bound by the will of a mighty psychic monster, (or more traditional Necromunda zombies, which are a danger, but a minor one compared to everything else), but even that is being very generous.
Imagine soldiers who are even only slightly drunk, or stoned. That's really not going to help them. Having said that, there are various drugs which could prolong endurance, but their effects tend to be exaggerated by pop culture.
