“The medical theory of ‘herd immunity’ posits that enough vaccinated individuals in a population can reduce the risk of contracting a disease — even for those who aren’t vaccinated. From the experience in Illinois and around the country, a relatively small number of armed people can similarly reduce the risk of crime — even for those who aren’t armed. So if you don’t own a gun but you are enjoying safer nights out on the town or sleeping more easily in your bed at night, give a little thanks to your neighbors who are gun owners. You’re the beneficiary of gun ‘herd immunity.’” – Paul Hseih in Herd Immunity Applies to Guns as Well as Vaccinations [at pjmedia.com]
[h/t instapundit.com]