Reasonable? Probably not. You should have about a week of food and supplies in the house, in case of any kind of disaster (stocking up more is most likely useless). Depending on how the disease spreads, you could get some surgical masks and latex gloves to mitigate your chance of infection. In the end though, none of it is going to be really useful. If/when a pandemic sweeps the planet, by definition a large number of people are going to get ill, so chances are for all the preparation we're all still going to be sick at some point.