Body’s Defense network

“As a newborn, in the birthing ward, you are given an injection. The needle punctures your skin, the very first line of your defense network. The threat didn’t even come through the line at the party’s velvet rope—not through your mouth or nose. It was sliced in through the roof. The steel invades the tissue. It will likely be clean of bacteria. Regardless, it will cause a localized response, a virtual panic among your cells. Months later, you might get scratched by the family cat. The cat may carry a microbe. So might the mosquito that landed on your crib and punctured your skin. Mobilization again, within an instant, the most sophisticated defense network in the known world explodes into action.”

Excerpt From: Matt Richtel. “An Elegant Defense.” –  Amazon Link