Can all players change roles with “New Assigment”?

Question

In Pandemic On The Brink, the wording for the "New Assignment" special event card says:

Any player (including the current player) may discard their current Role card and select a new one from the unused ones in the box.

Our reading of this card is that all players may chose to change their role cards when this card is played. Is this correct?

Answer 1

Only one player can change their role. The game's designer Tom Lehmann answered this in a thread on BGG:

Matt's and my intent is that any one player may change their role.