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We report fatal cases of novel coronavirus disease (COVID-19) in three brothers in Iran. An increased susceptibility to specific pathogens has been reported for a number of genetic defects. Considering the fact that most of them who are affected by COVID-19 recover, deaths in three brothers who lived separately and had no known underlying disease suggest genetic predisposition to COVID-19 in some individuals.
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Yousefzadegan et al. (2020) studied this question.
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