Toxins love to get you while you're young. Lead, mercury, secondhand smoke and sundry other environmental nasties do a lot more damage when tissue is immature, vulnerable and growing than when it's mature and comparatively fixed. Jeffrey Kluger
Aside from that, the coffee is 100 per cent organic and Fairtrade certified so you can be sure farmers are paid a fair price and there are no nasties in your brew. Source: Internet
As mentioned in the previous comment, just reading an HTML email could give the nasties a foothold therefore rule number should be ALWAYS use plain-text for emails. Source: Internet
Quality, civility and productivity are the antibodies against any nasties that stop by. Source: Internet
You, as the titular evil overlord type, construct a dungeon and fill it with traps, nasties, treasure and more nasties, then cackle with glee as clean-cut adventurers stride into your lair and get the Boromir treatment. Source: Internet
It's a layered approach that also encompasses Police, Biosecurity, Immigration and the likes - all agencies working together to stop the nasties filtering through the border. Source: Internet