The IRFU has confirmed the postponement of Ireland versus Italy in the interest of public health.
Absent for the opening three matches of the Six Nations, Anthony Watson is back in the mix for England this week.
Josh Adams will miss the games against England and Scotland as he requires surgery on the ankle he injured against France.
Wales full-back Liam Williams has joined the Scarlets ahead of schedule, while Rhys Webb joined Bath ahead of a move to Ospreys.
More Italian sporting fixtures have been delayed by the coronavirus, with Zebre & Benetton Treviso seeing matches postponed.
Southern Kings and Benetton Treviso both fell short on Welsh soil as Scarlets and Cardiff Blues earned Pro14 wins.