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Zombies, no. Economic collapse yes

^^^^
That's been inevitable since the invention of antibiotics.

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http://www.foxnews.com/health/2013/05/22/mysterious-illness-kills-2-in-southeast-alabama/

Careful out there, travelers!

http://www.cdc.gov/features/novelcoronavirus/?mobile=nocontent

Damn, that's pretty scary stuff.

I imagine that if/when the "epidemic" happens this is exactly how it'll begin.

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Hey there, here is my two cents:

Most likely event would be a natural disaster, something like a hurricane or tsunami. Both of which would be temporary  but could cause massive loss of life, most of which might not even happen during the event but the days following it.
I hope that a economic or government collapse never happens and I honestly do not think it will, at least in my life time. But it is always good to be prepared!

I have to also say that a lot of the cluster that happened in Katrina was the fault of the citizens. If there is a storm coming and you were told to leave, THEN LEAVE! And they cannot say they had no ride, the city and state sent busses all around to drive you away for free. People refused to use them for some idiotic reason.