'Low blink rate can be a sign of Parkinson's Disease... an earlier sign of the disease,' Dr Winter added. 'I am not saying that President Biden is on stimulants but it would not be that unusual to use.' Dr Winter said a low voice was another warning sign of Parkinson's. I think he is probably very pale, you could see it on the neckline,' Dr von Schwarz said. But Dr von Schwarz added: 'He was reading from a teleprompter which is just a repetition technique, which makes it hard to measure his intellectual capability.
