Covid-19 from 208 intensive care units across the UK.The subjects were those worst affected by the virus - with 22% of patients dying while suffering from the virus, and 74% of those studied requiring help to breathe through machines.Scientists then compared the DNA of those in the study with 100,000 anonymous members of the public and discovered five genes in common with those worst affected by the virus.It is now hoped that the research can be used to pinpoint the most effective drugs and treatments required by patients depending on their DNA.The identified genes are known as TYK2, CCR2, OAS1, IFNAR2, and DPP9.Dr Kenneth Baillie, who led the study, told the Daily Mail: "We predict that JAK inhibitors should confer benefit on [Covid-19].