1) The document discusses the importance of hand hygiene for healthcare workers, noting that poor personal hygiene like long nails, nail polish, and jewelry can harbor microorganisms and interfere with proper hand washing.
2) Several examples are given of disease outbreaks linked to healthcare workers with long nails or artificial nails.
3) The WHO guidelines state that even with proper hand washing, long nails and jewelry can remain contaminated with pathogens and increase infection risk, particularly for vulnerable patient groups.