Menactra

Meningococcal vaccine refers to any vaccine used to prevent infection by Neisseria meningitidis.[2] Different versions are effective against some or all of the following types of meningococcus: A, B, C, W-135, and Y.[2][3] The vaccines are between 85 and 100% effective for at least two years.[2] They result in a decrease in meningitis and sepsis among populations where they are widely used.[4][5] T... [wikipedia]