Here is a way to make an effective mask using common household materials in just a few minutes. You will need a wire coat hanger or similar pliable wire, tape, rubber bands and a paperclip to construct a mask frame that conforms very well to your face. Then you can use any type of cloth or paper that you have available that will work as the filter. In a pinch, several paper towels are a lot better than just breathing in an invisible droplet of spit and Coronavirus recently coughed out by a passerby.