Severus rolled his eyes at the greeting: "I was expecting you..." he said simply, and motioned for him to sit down. "I'm bottling it right now..." he muttered non-committal, the faster the b]etter.
He frowned when he realized the other's voice sounded weird and he turned to look at him. "Flu?" he asked, scowling farther, his long fingers wrapped around a clear vial. "How long have you been sick?"