Droplets are quite likely not the main problem. They settle very quickly, so you'd have to be very close to a sneeze to inhale any. So you blow your nose into a tissue which temporarily goes back in your pocket where you keep your clean tissues, banknotes, credit cards or coins. Your contaminated hands then leave virus particles on strap hangers, support bars, door handles, supermarket basket and trolley handles, then on to your own shopping bags, car keys and the car steering wheel. As a bonus you might just pick up some more from the usually disgustingly-filthy buttons on the card machine. And don't get me started on the almost invariable setup in gents' toilets in which the only way to get out is to grab, with your freshly washed hand, a door handle that pulls inwards and that has been touched by a hundred unwashed hands. We all have to touch objects contaminated by couldn't-care-less people (though they do give a shit, literally). Even you with your conscientious disposable wad of Kleenex are a culprit. The public health warnings we're getting represent a load of panic-stricken back-pedalling. They just might do a little bit of good.