The investigators overall goal is to develop, implement, test, and disseminate an intervention to increase colorectal cancer screening rates at Kaiser Permanente (KP) by providing home fecal immunochemical test kits (FIT) to eligible patients aged 50 and older who participate in annual influenza vaccination campaigns. The investigators hypothesis is that the FLU-FIT Program will be an effective method to increase colorectal cancer screening rates at Kaiser Permanente.