Mumps continue to be a bane on New Zealand's Northern Tour despite Northlander Jack Goodhue recovering from the affliction.
Now impressive rookie winger Rieko Ioane is in doubt for Sunday's test against France after also contracting the illness.
Ioane did not train last week in London or attend the scratchy win over the Barbarians - instead staying in isolation at the team hotel.
Mumps is a contagious viral infection, and the All Blacks have been wary of other squad members catching it. Recovery time usually ranges from anywhere between two to three weeks.
"It's unrelated to Jack Goodhue because they haven't been in contact," All Blacks coach Steve Hansen said as the team ventured from London to Paris on the train. "It's obviously come out of Auckland somewhere. It will be touch and go. He trained this morning it will depend on how well he comes through the week we'll wait and see."