Q: Dear Sage
Can a warforged be afflicted by lycanthropy? Warforged are immune to disease but it never specifies in the Monster Manual that lycanthropy is a disease.
A: No, they can’t. Though not technically a disease (it is a curse that acts like an affliction in some ways), only humanoids and giants can be afflicted with lycanthropy (see “Creating a Lycanthrope” MM 175). Warforged are neither, as they’re living constructs.