The problem of nails infection by a fungus , an onychomycosis in medical language, is rare in children, but common in the elderly : nearly one in two people aged 70 is affected 1 . In the general population, the frequency varies from 5% to 18%. The onychomycosis is caused by different types of fungi that thrive in environments hot , humid and dark, like shoes. These fungi feed on keratin, the protein that makes […]