View Single Post
Old 03-29-2014, 08:16 AM   #528
burn_this_city
Franchise Player
 
burn_this_city's Avatar
 
Join Date: Mar 2007
Location: Calgary
Exp:
Default

They aren't 100% effective. Herd immunity is what makes them more effective than they are on an individual basis.
burn_this_city is offline   Reply With Quote