colds are contagious a day before you know you are ill and for about two days afterwards. wearing a mask will help prevent the spread of infection but you will also need to wash your hands frequently during the day. hi the only thing would you may find the keeps you stuffed up and not being able to breath that good. i would not worry to much about passing on cold germs to much how do you think you got yours. your just be putting your self through a lot of agony. do hope this helps. good luck
if i have to go out when i have a cold will wearing a mask keep others from getting my germs?