In-ovo Antiviral Effect of Nigella sativa Extract against Newcastle Disease Virus in Experimentally Infected Chicken Embryonated Eggs. - Khan, Arif Ullah; Tipu, Muhammad Yasin; Shafee, Muhammad; Khan, Naimat Ullah; Kiani, Muhammad Masood Tariq; Rafeeq, Majed; Shah, Syed Iftikhar Ali (Pakistan Veterinary Journal, 2018)