ncbi.nlm.nih.gov/pubmed/10228259
ncbi.nlm.nih.gov/pubmed/10772215
ncbi.nlm.nih.gov/pubmed/19115974
ncbi.nlm.nih.gov/pubmed/21219752
ncbi.nlm.nih.gov/pubmed/21411187
ncbi.nlm.nih.gov/pubmed/19715426
ncbi.nlm.nih.gov/pubmed/21219730
ncbi.nlm.nih.gov/pubmed/21976190
ncbi.nlm.nih.gov/pubmed/20134005
ncbi.nlm.nih.gov/pmc/articles/P…
ncbi.nlm.nih.gov/pmc/articles/P…
ncbi.nlm.nih.gov/pmc/articles/P…
If you CAN, then wash your hands WITH soap and water.
(there's a ton of lists of 20 second things to sing/say, my favorite is the Star Trek Next Gen intro)