Nothing to do with that at all.
Whether he's vaccinated or not makes no difference to how it could have affected him in terms of him getting his fitness back.
I had COVID in July, 3 weeks after getting my first jab. I'm 26, so would have been in the line before 23-year-old Godfrey.
I was ill for a few days, but it took me absolutley ages to get my fitness back. I'm a keen cyclist and runner. For perspective, I cycled 110k the day before I tested positive, and 40k that day (before I knew I was positive obviously). Heart rate in the 120s/low 130s on average, averaging 28kmph.
I still, two months later, can't manage a 40k ride mate. I'm struggling to sustain power and I'm lucky if my heart rate is in the low 140s on average. I was just about back to doing them and getting my runs up when I had my second jab at the start of September and that set me back again.
I can't stress how much it can affect you long term in terms of fitness. And while I consider myself fit and healthy (Vo2 max in the top 10% for my age which ain't bad going), I'm not an athlete who is relying on their fitness and strength and power. It takes that from you - that's the biggest thing, that power and ability to recover and go again and feel just as strong. I can't describe it other than that. My mate, who is a footballer and cricketer, had no such issues with his long-standing fitness. It just affects everyone differently.