Well, the first noticeable thing that would happen is that you would turn into a thrall of what ever vampire bite you. Seeing as thralls and zombies are fairly similar minus the rotting skin and being hungry for blood instead of brains, the vampiric longevity would cancel out the zombie rotting skin and you would likely be hungry for both blood and brains. Since both zombies and vampires are undead there wouldn’t be any competition there. Now comes the wild card, the werewolf. Now you’re probably thinking that you would have the transformation same as normal weres on a full moon. In actuality the vampirism virus and the lycanthropy virus are very competitive with eachother with the vampirism virus being the stronger of the two. The lycanthropy virus would be in the body for a maximum of 5 hours and wouldn’t have a chance to have any effect on the body. Now you might be wondering why the vampirism virus doesn’t do the same with the zombie virus. That’s the thing, as i said at the beginning, the two are similar enough that they don’t really impact each other. The vampirism virus is happy to let the zombie virus effect the apitite because that simply means more pf an ample food source for the host.