In War for the Planet of the Apes, the Colonel is trying to avoid the spread of the disease which turns talking humans to non-talking beasts. In fact, by the end of the movie,
simple contact with Nova's doll makes him ill and unable to talk
However, Nova's dad ran from the soldier group months ago, but is still able to speak. When Ceaser & crew show up, he says:
I'm just going to put these sticks down.
It takes a day for the Colonel to be sick, but her dad is just fine after maybe months. Is this a plot-hole or is there any particular reason?