Fuentes:
https://www.who.int/gpsc/5may/tools/ES_PSP_GPSC1_Higiene-de-las-Manos_Brochure_June-2012.pdf
https://apps.who.int/iris/bitstream/handle/10665/102537/WHO_IER_PSP_2009.02_spa.pdf;jsessionid=A3C64EDB2E2C48545FDB686678E2D0CD?sequence=1