On the whole suggestions for home made products to cope with medical emergencies that you find on the internet are a really bad idea. But as it happens, this one that has been circulating on social media isn’t too far off the mark. Vodka is basically alcohol – so as long as it is a brand with a fairly high content you are getting alcohol that will have the capability of sterilising your skin. You’d want a good brand. Cheaper ones with lower alcohol content won’t work as well. I like the idea of the aloe vera. It will offset the drying effect of the alcohol to some extent. I don’t think I’d put so much in though. It is diluting the alcohol from the vodka and reducing its effectiveness. The tea tree is a pretty good option too. It has well established antibacterial properties and will stay around to give some protection against further infection after the alcohol has evapourated.