It's substantially more than two weeks for people who get a worse case of it, by the way. I had a mild case and was off for two weeks. If you get a more severe case, and especially if you need hospitalization, you're looking at at least a month of recovery. This virus attacks your lungs, which take a lot longer to recover from than your typical cold or even flu. The best comparison as to how long you're out of commission for is pneumonia.