Actual article: <a href="https://www.medrxiv.org/content/10.1101/2020.09.04.20188318v1.full.pdf" rel="nofollow">https://www.medrxiv.org/content/10.1101/2020.09.04.20188318v...</a><p>To save you a click, people with blood type "O" don't get covid-19 as much as other blood types. The article covers a lot more ground so it can be worth a quick read.