One of the most dangerous threats to the human population is a simple virus that is, a deadly disease that spreads rapidly throughout the world.
Within the last century we’ve had four major flu epidemics, as well as HIV and SARS, and scientists says it’s inevitable that another will occur.
The 1918 influenza outbreak killed more people than World War I, and if a deadly contagion surfaced today, it could spread even faster and infect even more people.
Considering how quickly diseases spread though all forms of modern transportation and the amount of international travel that takes place today, an outbreak similar to that of 1918 could have a more devastating impact.
 
And if nature doesn’t send such a deadly contagion our way, mankind just might.
Biological warfare is another threat that looms over the modern world, and diseases like anthrax, Ebola and cholera have all been weaponized.

Start by making water a priority on your list. For each person in your home, you should have no less than 3 gallons (11.3 liters) of water on hand. This will give each person enough water to wash up, cook with, and drink for about three days. Since you cannot be sure that help and supplies will arrive that quickly, you may do well to store a seven-day ration of water to give you a better chance of survival. If you have a family of five people, this means storing 35 gallons (132.5 liters).

Next, stock up on canned foods, such as vegetables, fruits, and starches, but don't stick to just the boring selections like peas and potatoes. Instead, go for a variety of vegetables and include choices for satisfying your sweet tooth, such as peaches and pears. Include meats and soups, as consuming nothing but fruits and vegetables can grow tiresome rather quickly and won't provide you with protein. You can store things like canned tuna, corned beef, beef stew, chowder, and even Spam®. While these things may not be as nutritious as their fresh counterparts, they can help your body to stay nourished and your taste buds satisfied until help arrives.