Hacker News stories for 2 PM on Friday Aug 24, 2012

0.686 Widespread vaccine exemptions are messing with herd immunity comments

0.660 Asteroids in under 600 lines of Common Lisp (uses SBCL and SDL) comments

0.467 The Boolean Graph comments

0.197 Yahoo Is Hiring comments

0.023 How thathigh.com solved the chicken and egg and grew to 1M views/mo with no SEO comments