The next time you call for room service, you could be ordering a side of rhinovirus. Many surfaces in hotel rooms, including the phone, may be contaminated with the cold virus, according to a University of Virginia study.

After 15 people with colds spent one night in a hotel, the researchers swabbed everything the congested guests had touched and found the rhinovirus residing on 35 percent of room surfaces. And although the germ count was conducted before housekeeping came knocking, the hot spots-light switches, the phone, and the TV remote-are often only dusted. That's important, because "a person's cold virus can linger on surfaces for at least another day," says researcher Owen Hendley, M.D. Pack a travel can of Lysol spray and annihilate the virus when you arrive.