This still needs to be changed.
Playing as Austria with 1.03beta, RC4, long campaign, I have found that this a safe event for the Austrian coalition. After the Reischarmee has unlocked and been organised it will always hit the locked stack in Ungarn which has a command useage of 42 and which has very few elite units in it. This is not a problem playing as Austria as I always seem to have plenty of regular replacements to hand. This event only really punishes Prussia as they have a real shortage of replacements, especially elite ones. If you are playing as Prussia against the AI then it doesn't matter so much, but against a human player it could be a real problem
It does need to be changed so that it hits a random stack.
Couldn't it use the same criteria that the typhus event uses to pick a target?
Or abandon it altogether? Typhus and "poor sanitation" are both the same thing aren't they?