Apparently, there’s a pretty critical blood shortage throughout the Washington DC metropolitan region right now — according to this article, there are around 50 units of type O blood in stock from Virginia to Pennsylvania as of this past weekend. If you are able, you might want to think about taking some time to donate blood over the next few days — both the Red Cross and INOVA have information about donor centers in the area. (The Red Cross also has a good list of restrictions on donating blood, which you might want to peruse before making the trip!)