What date did Vampirism & Lycanthropy become available for purchase in the Crown Store?

Pretty much what the title says. I remember playing many years ago and noticing the addition of Vampirism and Lycanthropy for purchase in the Crown Store.

Does anyone know the specific month/year that became a thing? I know the only way to get them used to he to contract it from the appropriate NPC or to be ‘bitten’ by a player that already had it.