
Pork and Chicken definitely need to be cooked thoroughly, especially since I think pork is prone to parasites, and chicken has the risk for salmonella poisoning.
One can buy irradiated ground beef which kills the bacteria I believe by subjecting it to "ionizing radiation" (I think ultra violet rays are an example of this) so that people can have their burgers medium rare using this technology. They say it's safe, but some people are skeptical of it of course.
Aside from how a steak is cooked, there's also a preference for what kind of steak people like. I like my New York strips, but most people seem to prefer Rib Eye. My complaint about Rib Eye is that it's just too fatty, and very very little actual meat. The New York strips on the other hand, you peel off the fatty part, and it's good to go!
