Spreading the Worgen Curse Questions

Can Worgen who have done the “Ritual of Balance” still spread the Worgen Curse through biting? I couldn’t find anything about it when I was searching around for an answer.

And if they CAN, do they have to be in their Worgen form for it to work? Could a Worgen in their human form, or a Worgen Druid in the cat or bear form, transmit the curse to any other human or elf?