https://www.bbc.com/news/health-54832563
Scientists looked at the DNA of patients in more than 200 intensive care units in UK hospitals....
They scanned each person’s genes, which contain the instructions for every biological process - including how to fight a virus.
Their genomes were then compared with the DNA of healthy people to pinpoint any genetic differences, and a number were found - the first in a gene called TYK2.
Genetic differences were also found in a gene called DPP9, which plays a role in inflammation, and in a gene called OAS, which helps to stop the virus from making copies of itself.