Rashid H, Abdul Muttalif AR, Mohamed Dahlan ZB, Djauzi S, Iqbal Z, Karim HM, Naeem SM, Tantawichien T, Zotomayor R, Patil S, Schmitt HJ Abstract Hajj and mass gatherings Pneumococcal disease 2013 Travel Medicine and Infectious Disease 2013;11:288-94