If you ever feel like no one is on your side, consider this: there's an army of white blood cells inside you right now, greater in number than the entire population of the planet. This army, some 100 billion strong, patrols your body at all times, ready to protect and defend you. Everywhere you go, they’re with you. You can't forget to pack them, you can’t misplace them. It's truly fascinating to watch.
So remember, you’ve got an army of 100 billion on your side.