Mae'r dystiolaeth yn glir mai cadw pellter o 2 fetr a sicrhau hylendid dwylo da yw’r ffordd fwyaf effeithiol o ddiogelu eich hun ac eraill rhag dal coronafeirws, ond mae’r canllawiau diweddaraf gan Sefydliad Iechyd y Byd yn dweud y gallai gorchuddion wyneb tair haen helpu i reoli’r feirws mewn rhai amgylchiadau.
The evidence remains clear that maintaining a 2 metre distance and good hand hygiene is the most effective way to protect yourself and others from contracting coronavirus, but the updated guidance from the WHO says 3 layer face coverings could help provide some control of the virus in specific circumstances.