https://www.explainxkcd.com/wiki/index.php?action=history&feed=atom&title=1161%3A_Hand_Sanitizer 2026-05-23T03:03:13Z Revision history for this page on the wiki MediaWiki 1.30.0 https://www.explainxkcd.com/wiki/index.php?title=1161:_Hand_Sanitizer&diff=336183&oldid=prev 2024-02-29T21:35:02Z

<p></p> <table class="diff diff-contentalign-left" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr style="vertical-align: top;" lang="en"> <td colspan="2" style="background-color: white; color:black; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: white; color:black; text-align: center;">Revision as of 21:35, 29 February 2024</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l8" >Line 8:</td> <td colspan="2" class="diff-lineno">Line 8:</td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'>&#160;</td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>==Explanation==</div></td><td class='diff-marker'>&#160;</td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>==Explanation==</div></td></tr> <tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>The number of germs that would be left after using the <del class="diffchange diffchange-inline">{{w|</del>hand sanitizer<del class="diffchange diffchange-inline">}} </del>is 200 million times 0.01%. 0.01% is equivalent to 0.0001 in decimal, so the multiplication is 200 000 000 &amp;times; 0.0001. That is 20 thousand germs, which is still a surprisingly large number of germs. Recently, scientists [http://www.dailymail.co.uk/sciencetech/article-2257098/Larry-projectile-vomiting-robot-helping-British-team-learn-stop-spread-norovirus.html have shown] that it only takes 20 virus particles to infect someone (with analyzed virus; not all germs are equally effective). However, they have also previously noted that the effectiveness of hand sanitizer is actually higher than 99.99%, but it's a bit awkward to print a more precise decimal in an advertising slogan. (Several brands actually kill near 100%, but don't want to risk going to court for false advertising because a few germs got past.)</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline">In this comic, [[Cueball]] is looking at a poster telling him about the number of germs in a sneeze droplet. He then looks at the label on his {{w|hand sanitizer}}, and goes &quot;Ew.&quot;, thinking about how many germs he would still have on his hands even after applying hand sanitizer to his hands.</ins></div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>&#160;</div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>The number of germs that would be left after using the hand sanitizer is 200 million times 0.01%. 0.01% is equivalent to 0.0001 in decimal, so the multiplication is 200 000 000 &amp;times; 0.0001. That is 20 thousand germs, which is still a surprisingly large number of germs. Recently, scientists [http://www.dailymail.co.uk/sciencetech/article-2257098/Larry-projectile-vomiting-robot-helping-British-team-learn-stop-spread-norovirus.html have shown] that it only takes 20 virus particles to infect someone (with analyzed virus; not all germs are equally effective). However, they have also previously noted that the effectiveness of hand sanitizer is actually higher than 99.99%, but it's a bit awkward to print a more precise decimal in an advertising slogan. (Several brands actually kill near 100%, but don't want to risk going to court for false advertising because a few germs got past.)</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'>&#160;</td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>&quot;Hipster CDC&quot; is a combination of the acronym for the {{w|Centers for Disease Control and Prevention}}, an organization dedicated to studying infectious diseases and limiting their spread, with the label {{w|Hipster (contemporary subculture)|hipster}}. Hipsters form a cultural group associated with a distaste for popular culture; they stereotypically talk about how bands, authors, etc. were better before they &quot;went mainstream&quot; and proclaim that they liked a certain thing &quot;before it was cool.&quot;</div></td><td class='diff-marker'>&#160;</td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>&quot;Hipster CDC&quot; is a combination of the acronym for the {{w|Centers for Disease Control and Prevention}}, an organization dedicated to studying infectious diseases and limiting their spread, with the label {{w|Hipster (contemporary subculture)|hipster}}. Hipsters form a cultural group associated with a distaste for popular culture; they stereotypically talk about how bands, authors, etc. were better before they &quot;went mainstream&quot; and proclaim that they liked a certain thing &quot;before it was cool.&quot;</div></td></tr> </table>

1234231587678 https://www.explainxkcd.com/wiki/index.php?title=1161:_Hand_Sanitizer&diff=336182&oldid=prev 2024-02-29T21:26:31Z

<p></p> <table class="diff diff-contentalign-left" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr style="vertical-align: top;" lang="en"> <td colspan="2" style="background-color: white; color:black; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: white; color:black; text-align: center;">Revision as of 21:26, 29 February 2024</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l8" >Line 8:</td> <td colspan="2" class="diff-lineno">Line 8:</td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'>&#160;</td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>==Explanation==</div></td><td class='diff-marker'>&#160;</td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>==Explanation==</div></td></tr> <tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>The number of germs that would be left after using the hand sanitizer is 200 million times 0.01%. 0.01% is equivalent to 0.0001 in decimal, so the multiplication is 200 000 000 &amp;times; 0.0001. That is 20 thousand germs, which is still a surprisingly large number of germs. Recently, scientists [http://www.dailymail.co.uk/sciencetech/article-2257098/Larry-projectile-vomiting-robot-helping-British-team-learn-stop-spread-norovirus.html have shown] that it only takes 20 virus particles to infect someone (with analyzed virus; not all germs are equally effective). However, they have also previously noted that the effectiveness of hand sanitizer is actually higher than 99.99%, but it's a bit awkward to print a more precise decimal in an advertising slogan. (Several brands actually kill near 100%, but don't want to risk going to court for false advertising because a few germs got past.)</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>The number of germs that would be left after using the <ins class="diffchange diffchange-inline">{{w|</ins>hand sanitizer<ins class="diffchange diffchange-inline">}} </ins>is 200 million times 0.01%. 0.01% is equivalent to 0.0001 in decimal, so the multiplication is 200 000 000 &amp;times; 0.0001. That is 20 thousand germs, which is still a surprisingly large number of germs. Recently, scientists [http://www.dailymail.co.uk/sciencetech/article-2257098/Larry-projectile-vomiting-robot-helping-British-team-learn-stop-spread-norovirus.html have shown] that it only takes 20 virus particles to infect someone (with analyzed virus; not all germs are equally effective). However, they have also previously noted that the effectiveness of hand sanitizer is actually higher than 99.99%, but it's a bit awkward to print a more precise decimal in an advertising slogan. (Several brands actually kill near 100%, but don't want to risk going to court for false advertising because a few germs got past.)</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'>&#160;</td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>&quot;Hipster CDC&quot; is a combination of the acronym for the {{w|Centers for Disease Control and Prevention}}, an organization dedicated to studying infectious diseases and limiting their spread, with the label {{w|Hipster (contemporary subculture)|hipster}}. Hipsters form a cultural group associated with a distaste for popular culture; they stereotypically talk about how bands, authors, etc. were better before they &quot;went mainstream&quot; and proclaim that they liked a certain thing &quot;before it was cool.&quot;</div></td><td class='diff-marker'>&#160;</td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>&quot;Hipster CDC&quot; is a combination of the acronym for the {{w|Centers for Disease Control and Prevention}}, an organization dedicated to studying infectious diseases and limiting their spread, with the label {{w|Hipster (contemporary subculture)|hipster}}. Hipsters form a cultural group associated with a distaste for popular culture; they stereotypically talk about how bands, authors, etc. were better before they &quot;went mainstream&quot; and proclaim that they liked a certain thing &quot;before it was cool.&quot;</div></td></tr> </table>

1234231587678 https://www.explainxkcd.com/wiki/index.php?title=1161:_Hand_Sanitizer&diff=282865&oldid=prev 2022-05-26T19:50:45Z

<p>Reverted vandalism with <a href="/wiki/index.php/User:CRLF/OneClickUndo.js" title="User:CRLF/OneClickUndo.js">User:CRLF/OneClickUndo.js</a></p> <a href="//www.explainxkcd.com/wiki/index.php?title=1161:_Hand_Sanitizer&amp;diff=282865&amp;oldid=282491">Show changes</a>

Vandalbane https://www.explainxkcd.com/wiki/index.php?title=1161:_Hand_Sanitizer&diff=282491&oldid=prev 2022-05-26T19:05:10Z

<p>Reverted edit by anti-crap user</p> <a href="//www.explainxkcd.com/wiki/index.php?title=1161:_Hand_Sanitizer&amp;diff=282491&amp;oldid=279471">Show changes</a>

Donald Trump https://www.explainxkcd.com/wiki/index.php?title=1161:_Hand_Sanitizer&diff=279471&oldid=prev 2022-05-26T17:42:29Z

<p>Reverted vandalism with <a href="/wiki/index.php/User:CRLF/OneClickUndo.js" title="User:CRLF/OneClickUndo.js">User:CRLF/OneClickUndo.js</a></p> <a href="//www.explainxkcd.com/wiki/index.php?title=1161:_Hand_Sanitizer&amp;diff=279471&amp;oldid=279354">Show changes</a>

CRLF https://www.explainxkcd.com/wiki/index.php?title=1161:_Hand_Sanitizer&diff=279354&oldid=prev 2022-05-26T17:34:26Z

<p>Reverted edit by anti-crap user</p> <a href="//www.explainxkcd.com/wiki/index.php?title=1161:_Hand_Sanitizer&amp;diff=279354&amp;oldid=279346">Show changes</a>

Donald Trump https://www.explainxkcd.com/wiki/index.php?title=1161:_Hand_Sanitizer&diff=279346&oldid=prev 2022-05-26T17:34:22Z

<p>Reverted vandalism with <a href="/wiki/index.php/User:CRLF/OneClickUndo.js" title="User:CRLF/OneClickUndo.js">User:CRLF/OneClickUndo.js</a></p> <a href="//www.explainxkcd.com/wiki/index.php?title=1161:_Hand_Sanitizer&amp;diff=279346&amp;oldid=279303">Show changes</a>

CRLF https://www.explainxkcd.com/wiki/index.php?title=1161:_Hand_Sanitizer&diff=279303&oldid=prev 2022-05-26T17:33:49Z

<p>Reverted edit by anti-crap user</p> <a href="//www.explainxkcd.com/wiki/index.php?title=1161:_Hand_Sanitizer&amp;diff=279303&amp;oldid=279285">Show changes</a>

Donald Trump https://www.explainxkcd.com/wiki/index.php?title=1161:_Hand_Sanitizer&diff=279285&oldid=prev 2022-05-26T17:33:38Z

<p>Reverted vandalism with <a href="/wiki/index.php/User:CRLF/OneClickUndo.js" title="User:CRLF/OneClickUndo.js">User:CRLF/OneClickUndo.js</a></p> <a href="//www.explainxkcd.com/wiki/index.php?title=1161:_Hand_Sanitizer&amp;diff=279285&amp;oldid=279224">Show changes</a>

CRLF https://www.explainxkcd.com/wiki/index.php?title=1161:_Hand_Sanitizer&diff=279224&oldid=prev 2022-05-26T17:31:41Z

<p>Crapped page</p> <a href="//www.explainxkcd.com/wiki/index.php?title=1161:_Hand_Sanitizer&amp;diff=279224&amp;oldid=273171">Show changes</a>

Donald Trump