Ok, sure, your immune system puts the US Dept. of Homeland Security to shame. To be fair though, it did evolve over millions of years instead of being crammed together over a few months in a bill so large that no one actually read it.
This 6 minute animation from Kurzgesagt explains just part of the awesome complexity of your immune system and how it works. What is really amazing is that one day soon, nanotechnology will allow us to add to this complexity in very specific and customized ways (such as custom built cells designed to fight cancer when it first appears).