Alfelali M, Haworth EA, Barasheed O, Badahdah A-M, Bokhary H, Tashani M, Azeem MI Kok J, Taylor J, Barnes EH, El Bashir H, Khandaker G, Holmes EC, Dwyer DE, Heron LG, Wilson GJ, Booy R, Rashid H, on behalf of the Hajj Research Team Full text Hajj and mass gatherings Respiratory Disease - General 2020 PLoS ONE 2020;15(10):e0240287