The Australian government Tuesday announced a travel ban on all flights from West African countries, including Guinea, Sierra Leone and Liberia. However, following the recent declaration of Nigeria and Senegal as Ebola-free nations, they were not included.
This was made known in an announcement by the Australia's Minister of Immigration, Scott Morrison.

Source: http://www.ereporter.com.ng/index.php/world-news/item/852-australia-bans-travel-flight-from-west-africa-over-fear-of-ebola