Studies Shows Touch is Highly Effective at Spreading Rhinovirus, Air Alone is Not.

"When young, healthy adults touched either coffee cup handles or plastic tiles that had been contaminated with rhinovirus, and then touched their faces, half of them came down with a cold": https://www.washingtonpost.com/opinions/five-myths-about-the-common-cold/2015/11/13/2588a7ba-829f-11e5-8ba6-cec48b74b2a7_story.html?utm_term=.a9ea8f8350e5

Is a 50% infection rate high? When airborne transmission is used alone, the transmission rate is near zero: "Under laboratory conditions, when healthy volunteers are kept with those suffering colds, it is remarkably difficult to spread the infection. This is because the mucus from the respiratory tract of someone infected has to get directly into your respiratory tract.": http://www.smh.com.au/news/Health/Kiss-your-fears-goodbye/2005/05/26/1116950789651.html

Another study showed transmission from fingers to eyes and nose resulted in 100% transmission rate of Rhinovirus. The study also showed that using iodine on just the hands was effective a preventing infection: http://www.jstor.org/stable/30114992?seq=1#page_scan_tab_contents

Right Diagnosis: "It is also important to avoid touching your eyes, nose, and mouth, which can transmit the virus from your hands into your body."

RightDiagnosis.com is one of the world’s leading providers of online medical health information. The site is an independent, objective source of factual, mainstream health information for both consumers and health professionals. Read what they have to say about touching your face:

http://www.rightdiagnosis.com/f/flu/intro.htm

MedlinePlus: "Avoiding touching your eyes, nose or mouth"

MedlinePlus is the National Institutes of Health's Web site for patients and their families and friends. Produced by the National Library of Medicine, the world’s largest medical library, it brings you information about diseases, conditions, and wellness issues in language you can understand. MedlinePlus offers reliable, up-to-date health information, anytime, anywhere, for free. This is what they say about touching your face:

https://medlineplus.gov/germsandhygiene.html