Almost two million pounds of ground beef have been recalled because of possible e.coli contamination.
Food safety experts say people often don't cook burgers enough to kill this dangerous strain of e.coli.
Food safety specialists at K-State say just because your meat is brown doesn't mean you've killed all the bacteria that could make you sick.
They recommend using separate utensils for raw meat and cooked meat and make sure to cook burgers all the way through.
"So we want to make sure that you're not ingesting live bacteria when you eat your hamburger. Hamburger has a tendency to have e. coli, salmonella and listeria involved and we want to make sure those are dead by cooking to 160 degrees, that will kill those bacteria," said Food Safety Specialist Bryan Severns.
The possibly tainted meat went to restaurants and grocery stores in nine states.
So far, none of the meat has been found in Missouri or Kansas.