When infected with the COVID-19 virus, some individuals are dealt stronger symptoms, while others are thankfully left with much milder symptoms. Researchers and scientists around the world were curious about the cause of this discrepancy, so a team of researchers from Stanford Medicine took a first step. The researchers compiled genomic data from about 50,000 patients and searched through their genome for any irregularities. The researchers identified 13 mutations within the genome that increased COVID-19 symptoms, majority were dealing with autoimmunity, and other sectors were lung health and immunity. That being said, each of the 13 mutations have different risk for severe COVID-19. Aside from those mutations, the only other influences would be lifestyle choices.