Adam: As a human and a hot security guard, he will be unaffected. He'll be helping other non-sicklys to assist those who have bit hit hard and trying to organise the school to some semblance of order. Oh, and looking after his sick girlfriend who hates being sick. Good times!
Berta: A were-gifted human. She's been sick before so she can deal with the horrendous flu-like symptoms, hoping it'll pass. There is a chance, though, that she won't make it. Mostly because I never get chance to play her and am now too busy to bother.
Blake: Blake is in the sun with Penny! On a cruise, living it up, to which he'll feel extremely guilty when he returns.
Elf: Elf isn't all human so he'll be feeling incredibly down and sick. He won't want anyone to come and see him, though, because that means touching, so he'll be hiding out in the tunnels.
Lincoln: NOT AFFECTED! At least not by the virus, but he's now stuck watching these people suffer at his hand.
Lloyd: Boom, the fire demon's getting very sick. After doing some last minute work in his office, he's getting incredibly ill and feels awful. I believe as a result Garret is taking personal care of him, much to his dismay. He will not be a good patient.
Rocky: She's only 1/4 fire demon (I think) so she'll be sniffly and groggy, and a hell of a pain in the ass, but she'll want to help people especially her friends.
Tiger: He's in Vegas with Cissy and Grace picking up a car and driving it back - mainly because we didn't want Grace to age! But they'll arrive back probably mid-plot and he'll want to help out as best he can. Blue's gonna get most of his attention.
Wes: As a human he's not sick, which means that the healer is going to run around trying to help all of those that he can. At the end of this it's quite likely he will be very sick but that's not the point. He's doing his whole bit to help the school.
Will: Sick sick sick. And he doesn't want to admit it. He'll be wanting to take care of Syn personally, as the poor thing will be worse than him, but he's also going to be very grumpy because he looks a mess, can't stand wearing his own clothes, and secretly just wants to die.