I have zero passion for what I do, but I do it as competently and as effectively as if if I did have passion. I find a downside to passion as I have had to clean up or pick up after those who lost their passion. You're a professional if you don't let passion afteraffect the quality of your work.
I can't afford to have subordinates or colleagues whom I can count on to finish their projects in a satisfactory manner - as long as they feel good, that is. I don't want to go around and keep asking "are you happy?" as a necessary way of keeping track whether the projects are going to be satisfactorily complete on time - that's would be a hostage situation, with me as the hostage :)
Your work is certainly not exciting to me but I recognize it as necessary. You need to get to the bottom as to why you are unhappy. Several possibilities:
Your work would be just as necessary to you but have a much greater meaning to you if you were performing it in a different context, say a children's hospital or a corporation that's pushing the boundaries of high tech.
Your work would be just as passionless to you no matter what setting you are performing your work in.
Your work would be exciting to you if you were able to perform other activities in your discipline that you are not performing at the moment.
No one can find their job interesting all the time and no job is exciting all the time. Only you can determine whether you are in a temporary funk and most likely, you'll be able make that determination only in hindsight.
The list of possibilities why you are unhappy is, of course, not exclusive and each possibility calls for a distinct adaptive response.