A friend of mine died from this when he was 24 years old. We never found out how he contracted it. He was healthy, athletic and dead in 24 hours.
"Unlike the older vaccine, Menactra also quells silent meningococcal infections among asymptomatic carriers, who manage to escape the microbe's treachery, only to pass the infection along to someone more susceptible through a kiss, a wayward cough or a shared glass or fork."