So are vaccinated kids “safe” from infection? That depends on a whole range of factors. It’s probably worth pointing out that there have been recent cases where fully vaccinated children were infected; I just spoke with a mother whose fully vaccinated daughter was in a coma and lost all motor function after she was infected with Hib and developed meningitis.

Ryan Chittum is a former Wall Street Journal reporter, and deputy editor of The Audit, CJR's business section. If you see notable business journalism, give him a heads-up at rc2538@columbia.edu.