As far as I know, all EVs the active Pokémon gains (or should gain if they're full on EVs), are transferred with the experience by the Exp. Share. So if the active gets 1, it transfers 1. If the active gets 1 and has a Macho Brace it transfers 2. And so on.
I'm not sure if they double-dip into PokéRus if both the active and Exp. Share Pokémon are infected. I've never been lucky enough to get the PokéRus, ever.