Of course, some people worry about the way that a kiss also puts us in very close proximity to another person's germs.
Travel pillows sell because no one wants to use those flimsy white ones the crew tosses on seats in the economy cabin. (Not only are these pillows uncomfortable, they're sponges for other people's germs.) Even sales of the ungainly SkyRest have grown 10% to 20% almost every year since its 2002 launch, according to the manufacturer.
It's also difficult to know what germs are lurking in an airline's pillows and blankets.
Bathing is important for removing germs from one's skin as well as washing away odors from sweat and dirt.
That's the toll in the U.S. from germs that are resistant to existing medicines.
Mr Romney noted that one book he had read recently, Jared Diamond's Guns, Germs and Steel (utterly brilliant, by the way) put economic differences down to geography.
Unlike chemotherapy, which uses chemicals to poison cancer cells, Rituxan's monoclonal antibody kills tumor cells much as the body's own antibodies kill invading germs.
That includes fingernails, because that's where you'll find the highest concentration of germs.
Though difficult to find, Germs was the book cited most often in the Times Literary Supplement's 2004 International Books of the Year.
Silver nanoparticles may come in handy wherever you want to kill germs for instance, in things as diverse as children's dummies (comforters to Americans), teddy bears, washing machines, chopsticks and bed linen.
Last week America's Environmental Protection Agency reversed its policy on the use of extremely small particles of silver for killing germs.
Here's something you might not have thought of: Ygrafs 14-15our phone could have a lot of germs on it.
First, it's all in the numbers of people who share equipment, exercise mats, lockers and showers that enable germs to travel to and from many an athlete.
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