South Africa will leave for Argentina in two groups over the weekend with the Rugby Championship trophy in their sights as coach Rassie Erasmus declared their camp in Auckland a success.
Fears that Ebola could spread into neighbouring countries have mounted since mid-July, when the disease claimed its first fatality in Goma, a city of two million people that lies adjacent to Gisenyi.
Three World Cup venues – Kamaishi, Osaka and Kumagaya – are hosting Japan warm-up matches, which should give organisers a chance to fine-tune their final preparations.
Williams is one of five centres vying for four spots in New Zealand's World Cup squad, along with Ngani Laumape, Anton Lienert-Brown, Jack Goodhue and Ryan Crotty, who is recovering from a broken thumb.
Folau, who has played 73 times for the Wallabies, raised more than Aus$2 million in just two days through the Australian Christian Lobby to help pay his legal fees.