What ever the threat/event where ever you are when it happens you must have some basic knowledge to survive. My Background: I myself having lived for more years that you can count, have survived many man-made and natural disasters. Including: hurricanes (5), typhoons (18), earth-quacks (7), tornadoes (9), wildfires (4), house fires (3), Blizzards (20+), chemical spills (1), aircraft accidents (2), Auto accidents (5), Mountain climbing accidents (2), being knifed (2), being shot (2), survived 4 major surgeries. I have lived in LA, Tokyo Japan, Okinawa Japan. South Korea, the Philippines, and now in NE Florida, I was raised on a Dairy farm in Wi., Horse/ Cattle ranched in Yuma Az. So I do have some background when I talk about prepping and survival. There are a few categories of Basic Survival listed below in their importance: 1. Shelter Without shelter you could die within hours of the event. Exposure/Hypothermia kills remembers that! A simple Tarp and 550 cord to tie it to trees can provide the most basic shelter. 2. Water Without clean drinking water you will not be able to survive beyond 3 days. Exposure and your own movements require you to drink plenty of water - a minimum of 3 litters per day.. Remember that a gallon of water weighs in at 8 pounds. If you have a bug out bag get a water filter that you can use anywhere. 3. Food Yes without food you could last 10-30 days depending on what you are doing. Food helps retain water in your body so you must have additional water for the preparation of your meals. About 1 gallon per adult. 72 hours is 6 meals at least. MRE's work find and have a shelf life of 5-7 years depends on temperature. 4, Medical/Personal Hygiene I combined these because once you are in a survival situation you do not have the back up resources to help you survive. A major health emergency could see you dead within 60 seconds. A single cut or scratch could cause you to die without proper treatment. Get some first aid classes/CPR training from the local RED CROSS. 5. Security Yes the big one that everyone has an opinion about security, guns, and knives.. If you are out and about trying to survive you may not want others around you. You would need to act like everyone else is infected and stay well away from them. RICHFL - - I'm a retired GySgt USMC, and retired Deputy Sheriff, State of Florida.