You might think that disposable face masks are only for doctors and nurses who work in hospitals or offices. This is the only time you've seen them for a long time, but now you see them everywhere you look, especially during flu season.
Don't think of it as something you may never use, because you may find that at some point in your life it is very useful and even necessary. They may seem expensive to some people for almost the bulk of the money, but they are worth the price if they do the job they are supposed to do.
If you're hospitalized today during or before flu season, you'll see a supply of disposable face masks on your way to the door. Most offices and hospitals today want you to wear them if you have the flu, have been exposed to the flu, or are just worried that someone you are going to might have the flu. This can be very effective at stopping the spread of flu in medical settings where you are most likely to catch flu. Feel free to use it and don't feel stupid unless you like the flu of course.
If you have a newborn during flu season, you may want to have disposable face masks for your home visitors if you are not sure if they are okay or not. If you have premature babies that you bring home during flu season, you need to be more careful because they may have weaker immune systems.