I went and searched ready.gov , a Homeland Security Website, to see what the recommended amount of storage is for emergencies. You can find their food supply list here. I looked at it awhile ago, and thought that I remembered that the recommended amount of storage was for 3 months, but according to the information linked, the suggestion is 3 days. This does not exactly mesh with the information that I somehow have gathered as an impression while reading about emergency quarantines, which is that emergency quarantines last 3 months. Perhaps I just mixed myself up with the overabundance of 3s...in any case, nothing like an official link to clear up confusion. There are good ideas listed.
Thought you'd like to know--and hope you are prepared/preparing for any emergencies with things that you would need under difficult circumstances. One such possible emergency is a potential flu pandemic, which is all over the news. Also, of course, I hope that you/I/we won't need any such supplies for emergency purposes....