The Chief Medical Officer says it is "concievable" that people may be asked to wear masks, which may help ease the current Covid-19 restrictions.
The W-H-O say the equipment could lead to complacency and lowers the emphasis on washing hands and social distancing.
Dr Tony Holohan says every piece of advice could change - but currently masks are not necessary.
"It's conceivable, and I'm not making any prediction in this - it's conceivable.
"We might have certain measures around use of masks or PPE as part of how do we learnt to live in a situation where we're releasing some measures because we think it's important to do so, but we want to reduce the risk of transmission and infection having done that."
