Covid-19 has hit both the Ireland and New Zealand camps ahead of the first test of this summer's tour next weekend.
Mack Hansen has tested positive for the virus and is isolating away from the Irish squad.
Munster hooker Niall Scannell has been drafted into the squad, while Iain Henderson and Rob Herring both picked up knocks in training on Saturday.
Meanwhile, five positive Covid cases have emerged in the New Zealand squad, including head coach Ian Foster.
The All Blacks have confirmed that former Ireland head coach Joe Schmidt will assist with their preparations in Foster's absence.