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How to Beat the Winter Bugs
There is a chance that making your nose very acidic could protect you and also help you clear out the viruses which are currently up there. But I think what we don't know is how long that sort of acidic environment that you've artificially created would last for. You certainly don't want to be constantly spraying vinegar up your nose because it's really quite uncomfortable. It sounds to me like nasal sprays possibly, we don't have the trials yet, but mechanistically you think that's interesting. And number one, hand washing, just good, good hand washing. Can you take us through what good hand washing involves?