A study has found a connection between how people react to the coronavirus depending on blood type. Good news if you're type O, bad news if you're type A (like me).
Coronavirus: What does blood type have to do with COVID-19?
Funnily enough, I had wondered some time ago if blood type might be a factor in why the severity seemed so random but dismissed the idea as I don't have the first clue about medicine or science. Must have second sight.