If that is the strict definition we are going with then I will say this: 28 Days/Weeks Later is a horrible movie as their pandemic film looks just like a zombie movie, and is completely unoriginal as it steals the entire premise from I Am Legend (book not movie), only making them zombies and not vampires, and then I Am Legend (the movie, not the book) stole its reimagining from 28Days/Weeks Later.
Let's get real here. Richard Matheson didn't go around saying, "They aren't vampires, they're infected," because ultimately he offered a scientific explanation for vampirism. Intelligent, risen from the dead, blood sucking creatures of the night, who spread their kind through blood/bites = vampire, no matter the catalyst.
Animated, walking corpses with a violent bent for living humans = zombies, no matter the catalyst. I don't know who decided that of all the creatures and monsters out there that come from humans and can be spread to other humans decided zombies can be renamed based on the catalyst, but it sounds like the king of thing a hipster would come up with. If we want to get very, very technical, almost no "zombie movie" ever is actually a zombie movie. There are a few old school black magic zombies on film and only they meet the true definition.