Next time you're hop-stopping it on the subway, try and remember it's not just that woman in the corner eating a hot, malodorous burrito that's making you sick. A scientific study in Nottingham, England discovered that mass transit riders (that would be us) get ill around six times as much as non-riders, with a higher chance of suffering from acute respiratory infections. But here's the silver lining: Regular strap-hangers can build up an immunity to the viruses, whereas if you take that underground railway once in a while, you're pretty much screwed. We suggest taking the nearest line to your local Duane Reade to stock up on Echinachea. Scratch that, catch a cab. (New York Daily News)