Who knows my blood type?
Well, tittergrrl points out that it’s nice to know whether or not your blood type is more urgently needed for donation, although I’m sure that’s not what the asker is wondering about. But knowing your blood type can be useful in other ways beside emergency transfusion situations. I know someone who used knowledge of her blood type to help determine who her father was after the person in question was deceased and paternity couldn’t be tested in a more exacting manner. (Blood type is a pretty crude method of geneology, of course, but it can at least rule people out.
When I first gave blood at the Red Cross about a year ago, they sent me a donor card with my blood type listed on it about a week later. It’s free, and it helps people, and you get free cookies afterward. Plus, then you have a card to keep in your wallet saying what blood type you are, in case you’re prone to forgetting. I had asked my doctor 3 different times and forgotten 3 different times, until I started donating regularly.
