<prompt> Two girls in the same class are diagnosed with meningococcal meningitis Their 12 yr old close friend is in fear of contracting dis what advice should be given to herTwo doses of polysaccharide vaccineTwo doses of conjugate vaccineSingle dose of meningococcal vaccineNo vaccine needed as exposure has already occurred  <response>: Meningococcal conjugate vaccine mcv 4 have new largely replaced meningococcal polysaccharide vaccine Mps in prevention of meningococcal dis CDC recommends that all adolescents should recieve meninegiococcal conjugate vaccine MCV 4 IM 1stdose at 12 12 years and booster at 16 years ref : ananthanaryana 