When and for how long is a cold contagious? Prof. Kimberly Dowdell responds: http://j.mp/1mtpPGw @BostonGlobe
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
When and for how long is a cold contagious? Prof. Kimberly Dowdell responds: http://j.mp/1mtpPGw @BostonGlobe