Hajj: journey of a lifetime

In this Clinical Review by Abdul Rashid Gatrad and Aziz Sheikh, the dosage given for a vaccine was incorrect (BMJ 2005;330:133-7). The article said that pilgrims to the Hajj in Mecca have to be vaccinated against meningitis before attending—but the vaccine named, ACWY Vax, should be given only once (not twice, as was stated).