Sheldon: What kind of sick?
Penny: Oh, the flu, I guess.
Sheldon: I don't need you to guess, I need you to know. Now, when did the symptoms first appear?
Penny: Maybe Friday!
Sheldon: Friday! Was that morning or afternoon?
Penny: I don't--
Sheldon: Think, woman! Who blew their nose and when?

Sheldon: Well, as I predicted, I am sick. My fever has been tracking up exponentially since 2am, and I am producing sputum at an alarming rate.
Leonard: No kidding?
Sheldon: No. Not only that, it has shifted from clear to milky green.
Leonard: Alright, well, get some rest and drink plenty of fluids.
Sheldon: What else would I drink? Gasses? Solids? Ionised plasma?

Howard: It was Sheldon.
Leonard: I tried to stop you.
Howard: It's my own fault. I forgot the protocol we put in place after the great ear infection of '06.

Penny: Sheldon, you are a grown man, haven't you ever been sick before?
Sheldon: Well, of course, but, not by myself.
Penny: Really, never?
Sheldon: Well, once. When I was fifteen, and spending the summer at the Heidelberg Institute in Germany.
Penny: Studying abroad?
Sheldon: No, visiting professor. Anyway, the local cuisine was a little more sausage-based than I'm used to, and the result was an internal blitzkrieg with my lower intestine playing the part of Czechoslovakia.

Leonard: How was Nebraska?
Penny: Oh, better than North Dakota! [silence] I guess that joke's only funny in Nebraska.
Sheldon: From the data at hand you really can't draw that conclusion. All you can say with absolute certainty is that that joke is not funny here.
Penny: Boy, it's good to be back.

Leonard: What the hell are you doing?
Sheldon: I'm making petri dishes to grow throat cultures.
Leonard: With lime jello?
Sheldon: I need a growth medium, and someone polished off the apricot yogurt. Here, swab my throat.

Penny: Sheldon, what are you doing here?
Sheldon: I'm sick, thank you very much.
Penny: How could you have gotten it from me? I'm not sick.
Sheldon: You're a carrier. All these people here are doomed. You're doomed!

Penny: Okay, what kind of soup do you want?
Sheldon: Well, my mother used to make me this split pea with little frankfurter slices and these home made croûtons.
Penny: We have Chicken Tortilla and Potato Leek.
Sheldon: Can I get any of those with little frankfurter slices and home made croûtons?
Penny: No.
Sheldon: Then surprise me.

Raj: Well if you leave now, you can be back before the gorillas rip the crap out of Charlton Heston.
Howard: Unless Sheldon's there, in which case you'll be trapped forever in his whiny hyper neurotic snot-web.

Howard: Alright, you're close enough to Sheldon's room, deploy the sensor. Now turn it on.
Leonard: It wasn't on?
Howard: No.
Leonard: Then why did I have to crawl?
Howard: Oh, I guess you didn't.
Leonard: Okay, it's on.
Howard: Good. From this point forward you will have to crawl.
Leonard: I know!

Sheldon: Do you think Penny will come here and take care of us?
Leonard: I don't think Penny’s ever coming here again.
Sheldon: I'm very congested.
Leonard: Yeah, so?
Sheldon: Can you go to the kitchen, and get me the turkey baster labeled mucus.
Leonard: If I stand, I'll vomit.
Sheldon: Under the sink, yellow Tupperware bowl.

Sheldon: Is that a dog?
Leonard: Yes.
Sheldon: In the lab?
Leonard: Yes. They're training dogs to operate the centrifuge for when they need dogs to operate the centrifuge for blind scientists, I have to go.

Howard: There's a Planet of the Apes marathon at the New Art today.
Leonard: Five movies, two hours apiece. It's a start.

Penny: Sheldon, what do you want?
Sheldon: I want soup.
Penny: Why didn't you just ... Why didn't you just have soup at home?
Sheldon: Penny, I have an IQ of 187. Don't you imagine that if there were a way for me to have had soup at home I would have thought of it?
Penny: You can have soup delivered.
Sheldon: I did not think of that.

Sheldon: Wait. Will you please rub this on my chest.
Penny: Oh, Sheldon, can't you do that yourself?
Sheldon: Vaporub makes my hands smell funny.
Penny: But Sheldon-
Sheldon: Please, please, please, please, please, please, please.
Penny: I can't believe I'm doing this.
Sheldon: No, no, counter-clockwise or my chest hair mats.