Genetic flashpoints: Why Covid-19 hits some people harder than others SECTIONS Last Updated: Jul 10, 2021, 10:54 AM IST Share Synopsis The Nature report summarizes information from 46 studies and three meta-analyses investigating the role of human genetics in Sars-CoV-2 infections and Covid-19 severity. ANI Throughout the pandemic, one crucial question has perplexed scientists worldwide: Why do some people become so sick from Covid-19 while others show no symptoms at all? Now, a peek deep into the human genome by a global initiative with more than 3,000 researchers from 25 countries is providing some answers. There are 13 locations in the genome strongly linked to either susceptibility to the virus or severe cases, the researchers reported Thursday in the journal Nature.