A virus causes serious problems on Warehouse 13 on the episode "Love Sick." Check out the official promo now.
Added:

Warehouse 13 Season 3 Episode 3 Quotes

Claudia: I'm coming with you.
Artie: Why? No, why?
Claudia: A hospital Artie. There's going to be blood. When you faint someone needs to be there to break your fall.

Claudia: What's that smell?
Artie: I don't smell anything.
Claudia: Exactly, you're primped. You're going to see Dr. Vanessa.