The United Nations health agency's updating its guidelines for health workers dealing with the Ebola virus.

Tougher measures have been recommended, like doubling-up on gloves and making sure the mouth, nose and eyes are better protected.

Edward Kelley from the World Health Organisation says even deciding the sequence of taking off equipment is problematic.

"To ensure that something from your hand does not get on the goggle which then gets on your face or vice versa becomes very difficult."

Compulsory quarantine rules have already been imposed in several US states, worried about people returning home with Ebola.

But UN Special Envoy Dr David Navarro thinks it'll be counter-productive.

"So if they've got no symptoms please think very hard before putting restrictions on them.

"We really don't want to jeopardise the effort to mobilise health workers."