Tehran University of Medical Sciences Iranian Journal of Allergy, Asthma and Immunology 1735-1502 21 1 2022 02 06 The Association between Proportion HLA-BW4 or HLA-BW6 May Causes Immunity Failure in COVID-19 101 103 Hamid Chegni Department of Laboratory Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran Ardeshir Abbasi Department of Immunology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran Hajar Rajayi Department of Immunology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran Zuhair Mohammad Hassan Department of Immunology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran 2020 05 27 2021 06 30 No Abstract  https://ijaai.tums.ac.ir/index.php/ijaai/article/view/2844 https://ijaai.tums.ac.ir/index.php/ijaai/article/download/2844/1800