First, junk food can lead to health problems, so if schools banned it, that would prevent many diseases and sicknesses. Research shows that junk food can lead to heart disease, diabetes, arthritis, and even cancer. Did you know that 16% of children 6-19 are overweight? If schools would ban junk food that could easily decrease that 16% to a 10% it's that easy. When you gulp down a bottle of Coke or gobble up a few cookies, you may think, “it's not that bad I can easily burn all that sugar off easily.” Actually that bottle of coke and cookies is weakening your immune system. When your immune system is weak, your body is not strong enough to fight viruses or illnesses, and is more prone them. But, there is hope. If schools banned junk food and replaced it with healthier options, that could build up students immune systems and fight off sicknesses better.