Yes: The Meningococcal vaccine protects against 4 subtypes of the virus (a, c, y, and w-135). It does not protect against subtype b, which causes about one third of all meningococcus cases in the us. No vaccine is 100% effective. A vaccine's effectiveness also depends on a person's immune response to the vaccine. But just because a vaccine isn't completely effective is no reason to avoid getting it.
Answered 11/23/2016
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Yes: There are other serotypes other than type c....A, b, y, and w135 in particular.
Answered 8/24/2012
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