Furbank had been due to start Saturday’s 45-21 defeat to South Africa but pulled out after being rushed to hospital in Johannesburg and was replaced late on by Marcus Smith.
England have lost their last five tests, placing pressure on coach Steve Borthwick, and were well beaten in every department by the Springboks at Ellis Park.
They will travel to Argentina for their third fixture in this year’s inaugural Nations Championship, a test on July 18.