Speaking of Pears/Pairs

Things have been coming in twos again. It seems to happen a lot in medicine. Has anyone else ever noticed this at work?
This week I've had two cases of 5th metatarsal fracture, two schizophrenic Samoans, two children with high fever reactions to immunizations (one required hospitalization), and two cases of BOOP, Bronchiolitis Obliterans Organizing Pneumonia (just the name sounds awful enough, doesn't it?).
BOOP is really uncommon (one patient thought the hospital told him he had "poop" in his lungs, haha), and so to have two patients with it at the same time is a little odd. And they were like dopplegangers of each other, each one arriving for his followup visit carrying the same style of portable oxygen case, wearing nasal prongs, and his face puffy from steroids.

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