Estimating social contacts in mass gatherings for disease outbreak prevention and management: case of Hajj pilgrimage gan Tofighi, Mohammadali, Asgary, Ali, Tofighi, Ghassem, Najafabadi, Mahdi M., Arino, Julien, Amiche, Amine, Rahman, Ashrafur, McCarthy, Zachary, Bragazzi, Nicola L., Thommes, Edward, Coudeville, Laurent, Grunnill, Martin D., Bourouiba, Lydia

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