Leonard warns Penny better leaving before Sheldon starts spraying her with Lysol because he thinks Penny is contagious.
Later, Sheldon is so sensitive that he wants to make petri? dishes to grow throat cultures because he thinks if he wants to get ahead of disease he needs to know what's growing in his throat from that he has no idea what pathogen and thyroid Penny has introduced to their environment.?
And Sheldon's never been to Nebraska, he has no corn-husking antibodies.
spray: small drops of water thrown into the air
pathogen: any organism that can cause disease to people or animal
thyroid: any organism that can cause disease to people or animal
petrify: making people so frightened that they can not even think or move
husk: part that cover corn
corn: you can refer wheat and crop as corns.
swab: a cotton or wool that doctor and nurse use to put something on patient's body.
polish off: if you polish off food or drink, you have all of it.
polish: if you polish something, you clean to protect it and make it shine.