I'm not worried about it, there's no point in worrying really. The people in Scotland who had it are doing fine now, and Britain are (apparently) the best prepared for it anyway. And as most people have already pointed out, Mexico have a very poor healthcare system so when the news says that 147 people there have died of it you really shouldn't take it to mean too much, presuming you live in a country with good healthcare. And most if not all flights to Mexico have been cancelled for now so the chances of somebody bringing it back with them are pretty low.