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That study tested E. coli bacteria, not viruses. the CDC disagrees
'''Hand sanitizer''' is an antiseptic substance designed to kill the [[bacteria]] on one's hands. [[Isopropyl alcohol]] is the most common active ingredient. Hand sanitizer is usually over 60% [[alcohol]], since this is considered the effective threshold;<ref>http://www.nyc.gov/html/doh/flu/downloads/pdf/flu-hand-sanitizer.pdf</ref> 62% seems to be the most common concentration used among companies. There are also non-alcoholic hand sanitizing substances such as [[triclosan]] or [[ benzalkonium chloride]], but such products are less common due to expense and potential health risks of such chemicals. Medical researchers concluded that hand sanitizing is more effective against fighting the common cold than hand washing.<ref>
'''Hand sanitizer''' is an antiseptic substance designed to kill the [[bacteria]] on one's hands. [[Isopropyl alcohol]] is the most common active ingredient. Hand sanitizer is usually over 60% [[alcohol]], since this is considered the effective threshold;<ref>http://www.nyc.gov/html/doh/flu/downloads/pdf/flu-hand-sanitizer.pdf</ref> 62% seems to be the most common concentration used among companies. There are also non-alcoholic hand sanitizing substances such as [[triclosan]] or [[ benzalkonium chloride]], but such products are less common due to expense and potential health risks of such chemicals. Some research has concluded that hand sanitizing is more effective against fighting bacteria than hand washing.<ref>
{{cite journal
{{cite journal
| title =Research shows hand sanitizers more effective against cold
| title =Research shows hand sanitizers more effective against cold
| accessdate =2016-02-10 }}
| accessdate =2016-02-10 }}
</ref>
</ref>
But the [[Centers for Disease Control and Prevention |CDC]] maintains that hand washing is generally more effective for the avoidance of illness.<ref>http://www.cdc.gov/handwashing/show-me-the-science-hand-sanitizer.html</ref>
==Proper Use==
==Proper Use==