Saturday, June 27, 2009

How to Determine Blood Type by Simple Observation, an Addendum

O Positive:
O Negative:


In rare circumstances, a type O may develop blood cells so large they must be carried. There is no cure as this is a congenital condition. Special backpacks may be obtained with a doctor's prescription.

1 comment:

  1. Someday the world will thank you for your Very Important Work.

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