I keep medical supplies here, and for the flu there isn't much you can do anyway except take something like TheraFlu. But these past few days have certainly reminded me that a person needs to be able to "hold in place" and still have on hand what you need for health purposes. It's entirely possible that we may have some disruption in our transportation system with all the turmoil going on now. That means no trucks. Up here, that means no supplies after a few days.
Here are some books on "do it yourself" medicine that might make a nice addition to your reference library at home. I have some of them, and others I am trying to decide whether the investment is worthwhile. They can get pricey.