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Genomic differences selected through evolution may offer clues as to why COVID-19 outcomes vary widely

A new study identifies dozens of genomic variants that may drive these hard-to-predict differences in clinical outcomes. According to work led by University of Pennsylvania scientists, genomic variants in four genes that are critical to SARS-CoV-2 infection, including the ACE2 gene, were targets of natural selection and associated with health conditions seen in COVID-19 patients.