My Dad Had Double Pneumonia Recently And Recovered. However, Prior

My dad had double pneumonia recently and recovered. However, prior to the pneumonia, my dad had a fall and required stitches from a gash on his forehead. He is on Coumadin and the area of the fall puffed up and then burst. He lost a lot of blood from a broken artery and required stitches again. His blood count in the emergency room was 9, but now it's down to 8. He has no energy and he is even having difficult taking deep breaths. He is 85 years old. Do you think he needs a blood transfusion, and if so, would that help his energy level?