Today is World Cancer Day—a day in which to celebrate survivors and spread awareness for those who’ve been lost. Cancer cases are predicted to surge 57% worldwide in the next 20 years due to a growing and aging population. Researchers say that treatment will not be enough. Our focus needs to be on preventive public health policies involving prevention and early detection. But on a positive note, half of all cancers are preventable and can be avoided if current medical knowledge is acted upon. So to honor World Cancer Day, start living a healthier lifestyle and addressing bad habits like smoking and alcohol consumption. And remember the key is early detection.