The one thing that is easiest to share is the one thing that nobody wants to share: sickness. Wherever people come together to interact, it seems impossible to avoid the spread of bacterial and viral infections.
We witness and experience the domino effect of illness everywhere: Someone gets sick at work, and before you know it, half the office is taking turns being out on sick leave. This is brought home, and in a blink of an eye, the entire family is taking turns getting sick. A child takes it to school, and like wildfire, it soon spreads among other classmates. And this can continue in what may seem like a never-ending cycle.