Fuentes.:
www.en.wikipedia.org/wiki/Swine_influenza
www.healthcave.com/how-long-does-swine-flu-last/
www.questdiagnostics.com/2009H1N1/
www.medicinenet.com/swine_flu/page3.htm
www.who.int/mediacentre/news/statements/2009/
www.h1n1_pandemic_phase6_20090611/en/index.html
www.
colorado.edu/safety/h1n1/faq.html
www.cdc.gov/h1n1flu/vaccination/vaccine_keyfacts.htmwww.sciencedaily.com/releases/2009/04/090430111640.htm
www.cdc.gov/ncidod/eid/vol12no01/05-0979.htm