I doubt he was anti-vaccine. He was probably anti-MessengerRNA-Experimental-Gene-Therapy-Fraud.
Did he get early treatment?
Was he denied in-patient treatment for CoupFlu until his O2 level dropped?
BTW, going by pulse oximetry in diabetic patients with the Coof to determine oxygenation is notoriously unreliable.
His providers had to be aware of that.