It depends on the raw meat. Many meats or proteins can be eaten either raw or near raw. Things that can't are pork and chicken. It can make you very ill from bacteria that weren't killed off by cooking them first.
Raw meat is harmless. The problem is it is typically infested with harmful bacteria. So eat clean meat and you're fine, but most likely it has some blood borne bacteria in it that your body is not used to and will reject via vomiting or diarrhea. Some bacteria can be fatal at low doses as well to some immune systems.
Raw meat and under cooked meat may contain harmful bacteria and other organisms, ie. E.coli, Salmonella and Listeria (all can cause death). There are different parasites that can be transmitted via uncooked meat. Raw pork may contain Trichina a worm that forms cysts in human muscle. Raw beef and rabbit may contain tapeworm cysts.
From pork you can get many parasite's like worms tapeworms and such. Beef you can get ecoli and mad cow diasease. Chicken you can get salmanilla. Fish carry another whole verity of things. I might have spelled things wrong I am sorry. But just do you know most things that are meat that are "raw" at resturants are not truly raw. They have been lightly steamed, or put in an acid such as lemon juice. This kills anything in the meat and actually cooks it without heat. That's what there version of raw is cooked without heat! Sorry this is so long, hope it is helpful!