Barasheed O, Rashid H, Alfelali M, Tashani M, Azeem M, Bokhary H, Kalantan N, Samkari J, Heron L, Kok J, Taylor J, El Bashir H, Memish ZA, Haworth E, Holmes EC, Dwyer DE, Asghar A, Booy R, on behalf of the Hajj Research Team Abstract Hajj and mass gatherings 2014 Virologica Sinica 2014;29:364-71