Please stop talking about gasses, makes it sound like you don't know the difference between chemical weapons and biological ones.
Well I don't really know, it really depends on the disease and what the disease does and if it is containable. You could potentially make a disease that puts everyone into a coma, without a massive amount of other effects, that way a war could be stopped incredibly quickly and also with a minimum amount of deaths.
Obviously that is an incredibly cheap method of winning though, but I dunno think of the possibilities.
Problem, it'd hard to knock out people temporary, usually when it is forced it can cause long term damage and if you put people into a coma there is a chance they never wake up from it.
Bio weapons have only one reason to exist, that is to kill as many people as possible and to terrorize the population. There is no benefit, no good side, its all bad. That is why they are restricted and why most people don't want to use them. If they ever became fair game for warfare then we could easily destroy our population. That is why any use has to be contained and the user needs to be severely punished.
I agree, forcing a coma is often a side effect of way more ominous effects from a biological bomb. However it is very possible to affect a human beings chemical balance, maybe affecting their melatonin production making it physically impossible for them to stay awake, and even less likely that they would be able to aim properly or to attack (then have a cure already made to wake them up).
Dear Old Crow remember the first part of critical thinking, nothing is black and white, everything has it's advantages and disadvantages. With the technology we have now the only thing that comes out of a bio bomb is death and evil, but in the future it is not unlikely that it could be an integral part of non-violent warfare.
Also I know there are flaws with my design, but it is definitely possible to see a positive side of it.
When it comes to ABC-weapons the Atomic ones are quite clearly the worst, seeing as they don't only hurt human beings, they also ruin every aspect of the world. However it seems every1 is capable of seeing the advantages in having them, so why are you unable to see advantages in the Bio part?
The reason why I see no advantages is because somebody has yet to make something non lethal that works. It has either been used as a terror weapon or something to deny the enemy territory, nothing else. Yes in the future it may be possible that there is something that somebody comes up with but for now nothing has came about. There are many more non lethal weapons out there that are either fully tested or are coming online such as the microwave machine, or the sound amplifier or that green laser that causes temporary blindness and nausea, all proven to overload the sense but all the effects are temporary, none are permanent unless you feel like running towards the sound amp and blowing your ear drums out.
