Morning Scepticism: Hand Washing

It's quite amazing to consider that with all the advances of modern medicine that washing your hands regularly with soap is still the best way of stopping the spread of many diseases and reducing the risk of getting sick yourself. What's amazing about this is that it was discovered before there was germ theory! It's plausibility is wrapped up in the germ theory of disease now, but it goes to show that it's not necessarily necessary to need an underlying explanation to see that something works.