It is difficult to detect unless you know to look for it. The symptoms are pretty generic and easily misdiagnosed since few doctors would be expecting it. Still

It is difficult to detect unless you know to look for it. The symptoms are pretty generic and easily misdiagnosed since few doctors would be expecting it. Still not that great of an idea in such a high profile case, but it has the potential to be a potent weapon for an assassin that has access to it.