A low blood count means that something in your blood is at abnormally low levels, such as red blood cells, white blood cells, hemoglobin or platelets. There are many causes of a low blood count which range the spectrum of medical severity from a simple infection to cancer. Your doctor will diagnose your condition based on your symptoms, your medical history and your low blood cell count.
At standard design conditions, air coming out should be in the range of 55 to 60 degrees to cool the house down, regardless of the ambient house temperature. The unit should be able to cool even air at 85 degrees flowing into the unit down to 60 (at the vent) if it is functioning properly. Some factors that do influence the vent temp are where the unit is located, where the ducts are, how far the air has to travel, and the air speed.
A good rule of thumb is for air conditioning to be set to only 10C below the outside temperature. The dehumidifying effect of air conditioners on your home will mean that even at 25C or 26C inside, you will still feel cooler than if you were standing outside in 26C heat (ie because of lesser humidity).