Blackburn striker Jason Roberts is the club's latest player to come down with suspected swine flu.Roberts is set to miss Rovers' trip to Manchester United on Saturday after showing symptoms of the virus. [LNB]Boss Sam Allardyce, who said he has recovered after feeling unwell, said he and most of his squad were in good health after an outbreak in the camp. [LNB]Allardyce confirmed that centre-half Christopher Samba had returned to training but was still feeling weak. [LNB]"I'm OK now - I think we've only Jason Roberts," said Allardyce. [LNB]"There was another player suffering with it earlier in the week and Jason looks like he has it now, so we've left him at home and sent the doctor out to see him. [LNB]"The symptoms look very much like the general swine flu symptoms, so we will obviously go and get a full check on him."[LNB] Is anyone else gutted that our Jason is out with swine flu for tomorrow's game? Roberts must score Allardyce revealed on Monday that three of his players had contracted swine flu. [LNB]One of those was thought to be David Dunn, who looked in good health when he came off the bench against Peterborough in the Carling Cup on Tuesday. [LNB]Another was Samba and Allardyce admitted the Congolese defender has been "affected the most by the symptoms". [LNB]"He's been left pretty weak, I think he has lost about four or five kilos," he added. "It is an incredible amount of fluid he has lost. [LNB]"We'll have to check if he is strong enough to be capable of being selected for the squad on Saturday. We'll run him through training today and see where we go from there."