That’s a good point. I don’t know. Can bacteria be reanimated after being frozen solid? So maybe technically it’s still alive, just dormant?
I don't know about bacterium. . . I'd thing that freezing them except by flash freezing them would be a bit hard on the cellular walls as the cytoplasm in them expanded beyond the containment. Now viruses might be able to survive freezing, but then there is debate whether viruses are alive or not in the first place.