I have a chest freezer, 14 cubic feet, I have meat, vegetables, readymeals, bread, butter and so on in there. A hangover from my days at work I do a big shop every 5 weeks and only need to buy vegetables and stuff like that in the intervening weeks. As it has turned out I will be doing a 'big' shop this week. Once that is done, I would be able to hold out for at least a month, possibly longer. I still have kale and other cabbagy things in the garden. I will not be buying any extras, just in case.
The death rate for Covid-19, the virus's official name (just announced) is very low as, as well as those counted with the illness, there will be many others in China who have had a very mild attack of the illness, who have either not realised they had it, or just decided to keep clear of the medical authorities and self quarantened.