Whole-cut steak: bacteria sit on the surface, and searing kills them, so rare is a small, informed risk; the FDA's minimum is 145F with a 3-minute rest.
Ground beef is different: grinding distributes bacteria through the meat, so the FDA says 160F, no pink. Pregnant women, young children, older adults, and the immunocompromised should skip undercooked beef entirely, because Shiga toxin E. coli from undercooked ground meat can cause bloody diarrhea and life-threatening kidney failure. Severe cramps or bloody diarrhea within days of undercooked beef is a see-a-doctor pattern.
What to do
Common questions
Is it safe to eat rare steak?
Whole-muscle steak, yes with basic care; ground beef, no, and the difference is geometry. On an intact cut of beef, bacteria from the animal or processing live almost entirely on the surface, and a hot sear kills them, which is why a steak can be safely served rare. The FDA's safe minimum for whole cuts of beef, pork, veal, and lamb is 145°F with a 3-minute rest, measured with a food thermometer, though plenty of healthy adults accept a genuinely rare steak as a small, informed risk. Ground beef is a different food safety-wise: grinding mixes any surface bacteria through the entire patty, so the FDA sets 160°F for ground meats, no pink middle. That is why a medium-rare burger is a gamble and a rare steak mostly is not. Who should skip the gamble entirely: pregnant women, young children, older adults, and anyone immunocompromised, because Shiga toxin-producing E. coli from undercooked beef can cause bloody diarrhea and, per the FDA, a life-threatening kidney failure. Sourcing matters less than structure: a quality butcher does not change the geometry rule. If you develop severe stomach cramps or bloody diarrhea within days of an undercooked burger or steak, that is a see-a-doctor pattern, not a ride-it-out one.