Imagine living in a post apocalyptic world. Complete chaos from the start. Tragic loss of many loved ones. Money no longer has any value, and you'll most likely have property damage. Whatever created the disaster minimizes chances survival.
I watched this hour special on the Discovery channel "Top 10 ways the world will end" or some shit. Second was a plague outbreak. The most likely way that'd start is by some asshole chemists working with biological warfare unintenitionally spreading a lethal virus, creating a pandemic. The virus could be an organism that isn't universally considered alive, and continues to reproduce or replicate within their host. A zombie panademic is realistic. Don't get your hopes up though.
The plague could be an epidemic outbreak (HIV, anthrax, Ebola, smallpox, plague fleas). The outbreak starts in one region. By spreading the disease internationally it can be a weapon of war. Creating a pandemic outbreak overtime. Plague fleas (Black Plague), and anthrax (Sent in mail internationally) are two well known examples.
Amazing pool brought to you by my girl Josie. She had previous owners who neglected it. Personally love it. We caught a lil' frog in the swamp! She plans to eventually drain it and use it to skateboard with buddies.