Leafy greens are occasionally contaminated with harmful germs like other vegetables and fruit. E Coli is the most common bacteria that is present in lettuces. Washing leafy greens may not remove all germs. That is because germs can adhere to the outer lining of leaves and acquire inside them even. You may get unwell if you eat contaminated leafy greens without cooking. Another thing to be kept in mind is to thoroughly wash the lettuce because lettuce is sprayed with high amounts of pesticides to protect it on the farm. If not cleaned properly, these pesticides can be very harmful to your body.