For Healthcare Providers:
The immune systems is an exceptionally complex system that is hard to grasp for most patients, and even many of your colleagues. Share this video with your patients to provide them with a simplified, yet quite informative, explanation of how the system works.

For Patients:
Every second of your life, you are under attack. Bacteria, viruses, spores, and more living stuff wants to enter your body and use its resources for itself. The immune system is a powerful army of cells that fights like a T-Rex on speed and sacrifices itself for your survival. Without it, you would die in no time. This sounds simple, but the reality is complex, beautiful, and just awesome.

Source: Kurzgesagt.