Each year, Americans spend about $3 billion on doctors’ visits due to colds and another $2 billion on cold treatments. The workplace is ground zero for colds. You’d be surprised to find out where germs are most likely hiding in your office. Gathering data from a variety of different workspaces—law firms and call centers, among others—researchers swabbed thousands of surfaces. Here’s a list of the eight most contaminated areas. You might look at your keyboard differently after this.