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A: You look kind of green. 
B: I don't feel so good. I am feeling sick to my stomach. 
A: Have you had anything to eat lately? 
B: I had fried shrimp and clams for lunch. 
A: Perhaps the food was bad. 
B: Perhaps, but I haven't felt well for a few days now. 
A: Has anything been upsetting you lately? 
B: My stress level is pretty much what is usually is. 
A: Do you think that maybe you are getting the flu? 
B: It seems to me like I may have caught a bug.