Whether you have a cold or just don't want to catch any germs yourself, wearing a face mask is probably good option. Thanko's USB cat filter mask makes it easier to breathe while protecting you from virulent germs.
Thanko's cat face mask is embedded with a tiny and quiet, internal fan that filters in clean air, so you don't need to keep breathing in your own lunch breath. The mask can be USB-powered or battery-powered. This thing just looks so silly. Thanko says the idea stemmed from people who had a discomfort with breathing with face masks on.
Guaranteed to make you the talk of the town, you can buy one of these feline-themed filters for about $24 on Thanko's Japanese website.