Welsh club the Scarlets have had to forfeit their opening Champions Cup game away to Bristol on Saturday.
32 front line squad members are currently in quarantine at a hotel outside Belfast having returned from South Africa.
Their isolation period ends on Friday, just a day before the game.
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Scarlets say the welfare of their players is the priority and they are unable to assemble a match day panel of 23 in time.
With no possibility for the game to be re-arranged, Bristol have been awarded a 28-nil victory and 5 match points.
Munster will have enough players to successfully fulfill their assignment away to Wasps in Coventry on Sunday.
