I did some searches and read alot of post here and the one subject i don't see covered a lot is biological warfare. This is the one situation I am the most concern about. In the event of a pandemic, weather it is man made or naturaly occuring, this is the one SHTF event that will make it nessacary to avoid people completly. The speed at which germs spread in todays world is alarming. The only thing that has held off the use of these weapons is that no country that has them is crazy enough to use them. But we all know those days are long gone. You don't have to infect the whole country to make a SHTF situation, just use enough to scare everyone out of population centers, fear will do the rest.