England prop Mako Vunipola has been quarantined over coronavirus fears.
Vunipola was yesterday named in England's 34-man squad but the Rugby Football Union said he did not come into camp after travelling through Hong Kong on his return from Tonga over the weekend.
Vunipola's self-isolation has been described as a precautionary measure but the recommended 14-day quarantine period leaves him unlikely to take any further part in England's scheduled Six Nations matches against Wales and Italy.
Vunipola missed England's dominant victory over Ireland 10 days ago after flying to Tonga for family reasons. His return flight took him through virus-hit Hong Kong, and he has now gone into isolation.
Vunipola is not believed to have shown any symptoms of the illness.