Eating low grade raw hamburger is one thing, you are probably going to get some ecoli lol
But I have eaten plenty of beef tartar and carpaccio in my time and rare rare fine dry and wet aged steaks with no issue. Maybe is the delicious whisky I was drinking with it, but honestly you can get ecoli from vegetables that are just not washed well enough. I have never in my life heard of anyone getting a bug from undercooked steak. You sear the outside you are good, hamburger and ground meat all the dirty bits are mixed inside.
and blood who cares, I have eaten boudin noir on numerous occasions lol, I'm going to hell