Four years ago, when meningitis B, an extremely rare but potentially lethal form of the infection, sickened a small number of college students at Princeton and the University of California-Santa Barbara, there was no vaccine against the disease sold in the U.S. Despite its availability abroad, it had never been licensed in the country due to its limited marketability.
Scientific evidence supporting an absolute need to immunize against meningitis B still falls short. The risk of contracting it is smaller than that of being involved in a car crash.
