If you think your co-worker gave you a cold or the flu, you're probably right.

A new study conducted by scientists at the University of Arizona shows that half of the most commonly touched surfaces in the office (like the coffee pot handle, tabletops, doorknobs and phones) can become infected with a sick person's germs – all by lunchtime.

The study involved having 80 people go about their regular work-day business in an office at the university. Most of the study participants received droplets of water on their hands at the beginning of the day, but one of the participants got droplets of fake viruses, which acted like the cold, flu and stomach flu viruses.The researchers found that after just four hours, more than half of the office surfaces had traces of the fake viruses. And by the end of the day, 70 percent of the tested surfaces had traces of the fake stomach flu viruses. (Huffington Post)