The powerhouse prop was said to have been in self-isolation as a precaution against the coronavirus, having briefly travelled through Hong Kong en route home from a trip to visit family in Tonga.

However, Sarries insisted Mako and his brother Billy have not been subjected to self-quarantine and neither showed any symptoms linked to the coronavirus.

As such, Mako is available for selection when Sarries face Leicester Tigers in the Premiership despite having been ruled out of England's game against Wales.

"Billy Vunipola and Mako Vunipola returned to Saracens after visiting family in Tonga, which included a short stop at Hong Kong Airport," a Sarries statement read.

"Travellers returning from Hong Kong are not currently subject to mandatory quarantine or self-isolation unless they become symptomatic.

"Neither Billy or Mako have displayed symptoms of the coronavirus (Covid-19) and on their return to London were assessed by the club's medical staff.

"The duo have been around the Saracens environment for the past couple of days, with the latter available for selection this weekend.

"Saracens will continue to follow the Public Health England and World Health Organisation regulations surrounding coronavirus and the medical staff will be closely monitoring Billy and Mako on a regular basis."

Mako, who missed England's win over Ireland due to his visit to Tonga, was included in an initial training squad ahead of the crunch Twickenham encounter against Wales by head coach Eddie Jones.

However an RFU spokesperson said: "Mako is not in camp on medical grounds. He is not sick but it is a precaution."