I disagree with the advice given by @Stan. I have a tried-and-tested technique with bees and wasps which I have been using with complete success for many years.
When one of them is buzzing around I DO use my hands to ward them off, but, where I agree with Stan is that you should not do it agressively. The insect must not feel the need to defend itself but you are trying to "guide" it away in the gentlest way possible. It helps to remember that these creatures live in a world where things move around them all the time due to wind, or maybe the flicking tail of a cow. They are not prediposed to assume that a moving hand is intent on aggression.
If you have something sweet like a fruit drink or ice-lolly, they will be trying to get to that. I found that by guiding them away from it no more than FOUR times (almost always THREE times) they seem to sense that this snack is not worth the effort and they move on.
Remember, to sting you, these creatures need to land on you and deploy their stinger in a particular way. You will easily be able to kill it, or, my preference, flick it off you before it can hurt you. Really, their stinging mechanism is no danger at all unless you aren't aware they have already landed on you and they then feel threatened because you've done something like scratched the area or sat on them.
Using this trick, not only do I have a 100% success rate at defending myself and my family, I have regularly stepped-in in public places where a person (usually a young mother) is in a total panic due to an insect, and managed to restore the situation without bloodshed on either side. I've never had to let an insect taste me or my ice-cream. I don't have to worry about what scented products I use.
It's important to add that I live in the UK where most things are NOT trying to kill you on a daily basis. I wouldn't like to guarantee this in a country like Australia where, as Terry Pratchett put it, the only harmless wildlife is "Some of the sheep".