The CDC is recalling bags of red, yellow, and white onions.

According to the Centers for Disease Control and Prevention, 37 states, including North Dakota, South Dakota, and Minnesota have had salmonella outbreaks in bags of these onions. KVRR reports that four North Dakotans have been infected since the outbreak. So, if you recently bought a bag of red, yellow, or white onions, you should probably throw them all out and clean the surface the onions were laying on. Because people have gotten sick.

We do not know which stores were selling the contaminated onions.

USA Today reports that the public will not be notified about the stores that sold the onions, but that is standard practice. Since we will not know which stores the contaminated onions, it is probably just best to throw out any onions you are unsure of. No one wants to catch salmonella, but the CDC did give information on the illness.

How do you know if you have salmonella?

Apparently, salmonella symptoms are very similar to flu symptoms. According to the CDC, "Most people infected with Salmonella develop diarrhea, fever, and stomach cramping 6 hours to 6 days after eating contaminated food." Luckily, we are told that most people will recover without treatment. So, if you feel like you have the flu, you may want to think about the last time you ate onions!

Have you recently purchased a bag of red, yellow, or white onions and then later experienced flu-like symptoms?

See How School Cafeteria Meals Have Changed Over the Past 100 Years

Using government and news reports, Stacker has traced the history of cafeteria meals from their inception to the present day, with data from news and government reports. Read on to see how various legal acts, food trends, and budget cuts have changed what kids are getting on their trays.

CHECK IT OUT: See the 100 most popular brands in America