How soon did the supervisor learn of it anyhow? Unless the troop really went very much out of his way to keep it on the Q.T. (and what can you do on the Q.T. in Afghanistan anyway?) It was up to the supervisor then to be sure the troop got medication that worked if it could be had. There have surely been scads of rabid dog exposures in Afghanistan and none of them led to a case of human rabies, until this.
I can tell you've never herded cats. Or airmen. Or soldiers.
They do lots of stuff they try to hide.
In every part of the globe, garrison, and field.
Separate the medical issue, which is an issue, from the failure to follow orders issue that led to the death of a soldier.
/johnny